<p>In this study, we first obtain a closed form expression for the Euler sums of skew-hyperharmonic numbers <InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11139_2025_1196_Article_IEq1.gif" Format="GIF" Height="23" Rendition="HTML" Resolution="72" Type="Linedraw" Width="33" /> </InlineMediaObject> <EquationSource Format="TEX">\({\widetilde{h}}_{n}^{\left( r\right) },\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <msubsup> <mover accent="true"> <mi>h</mi> <mo stretchy="true">~</mo> </mover> <mrow> <mi>n</mi> </mrow> <mfenced close=")" open="("> <mi>r</mi> </mfenced> </msubsup> <mo>,</mo> </mrow> </math></EquationSource> </InlineEquation> which are defined as similar to the hyperharmonic numbers <InlineEquation ID="IEq2"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11139_2025_1196_Article_IEq2.gif" Format="GIF" Height="22" Rendition="HTML" Resolution="72" Type="Linedraw" Width="26" /> </InlineMediaObject> <EquationSource Format="TEX">\(h_{n}^{\left( r\right) }\)</EquationSource> <EquationSource Format="MATHML"><math> <msubsup> <mi>h</mi> <mrow> <mi>n</mi> </mrow> <mfenced close=")" open="("> <mi>r</mi> </mfenced> </msubsup> </math></EquationSource> </InlineEquation> in all respects. We then give a representation for the Euler-type sum of the numbers <InlineEquation ID="IEq3"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11139_2025_1196_Article_IEq3.gif" Format="GIF" Height="27" Rendition="HTML" Resolution="72" Type="Linedraw" Width="31" /> </InlineMediaObject> <EquationSource Format="TEX">\(a_{n,l}^{\left( 1\right) },\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <msubsup> <mi>a</mi> <mrow> <mi>n</mi> <mo>,</mo> <mi>l</mi> </mrow> <mfenced close=")" open="("> <mn>1</mn> </mfenced> </msubsup> <mo>,</mo> </mrow> </math></EquationSource> </InlineEquation> where <InlineEquation ID="IEq4"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11139_2025_1196_Article_IEq4.gif" Format="GIF" Height="46" Rendition="HTML" Resolution="72" Type="Linedraw" Width="149" /> </InlineMediaObject> <EquationSource Format="TEX">\(a_{n,l}^{\left( r\right) }={\widetilde{h}}_{n}^{\left( r\right) }\genfrac(){0.0pt}0{n+l}{l}^{-1}\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <msubsup> <mi>a</mi> <mrow> <mi>n</mi> <mo>,</mo> <mi>l</mi> </mrow> <mfenced close=")" open="("> <mi>r</mi> </mfenced> </msubsup> <mo>=</mo> <msubsup> <mover accent="true"> <mi>h</mi> <mo stretchy="true">~</mo> </mover> <mrow> <mi>n</mi> </mrow> <mfenced close=")" open="("> <mi>r</mi> </mfenced> </msubsup> <msup> <mfenced close=")" open="("> <mstyle displaystyle="true" scriptlevel="0"> <mfrac linethickness="0.0pt"> <mrow> <mi>n</mi> <mo>+</mo> <mi>l</mi> </mrow> <mi>l</mi> </mfrac> </mstyle> </mfenced> <mrow> <mo>-</mo> <mn>1</mn> </mrow> </msup> </mrow> </math></EquationSource> </InlineEquation> with <InlineEquation ID="IEq5"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11139_2025_1196_Article_IEq5.gif" Format="GIF" Height="23" Rendition="HTML" Resolution="72" Type="Linedraw" Width="76" /> </InlineMediaObject> <EquationSource Format="TEX">\({\widetilde{h}}_{n}^{\left( 1\right) }={\widetilde{H}}_{n},\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <msubsup> <mover accent="true"> <mi>h</mi> <mo stretchy="true">~</mo> </mover> <mrow> <mi>n</mi> </mrow> <mfenced close=")" open="("> <mn>1</mn> </mfenced> </msubsup> <mo>=</mo> <msub> <mover accent="true"> <mi>H</mi> <mo stretchy="true">~</mo> </mover> <mi>n</mi> </msub> <mo>,</mo> </mrow> </math></EquationSource> </InlineEquation> the <i>n</i>th skew-harmonic number. This representation enables us to show that the Euler-type sum of the numbers <InlineEquation ID="IEq6"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11139_2025_1196_Article_IEq6.gif" Format="GIF" Height="27" Rendition="HTML" Resolution="72" Type="Linedraw" Width="26" /> </InlineMediaObject> <EquationSource Format="TEX">\(a_{n,l}^{\left( r\right) }\)</EquationSource> <EquationSource Format="MATHML"><math> <msubsup> <mi>a</mi> <mrow> <mi>n</mi> <mo>,</mo> <mi>l</mi> </mrow> <mfenced close=")" open="("> <mi>r</mi> </mfenced> </msubsup> </math></EquationSource> </InlineEquation> can be expressed in terms of zeta values and harmonic numbers. Finally, we investigate the Dirichlet-type generating functions of the numbers <InlineEquation ID="IEq7"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11139_2025_1196_Article_IEq7.gif" Format="GIF" Height="27" Rendition="HTML" Resolution="72" Type="Linedraw" Width="31" /> </InlineMediaObject> <EquationSource Format="TEX">\(a_{n,l}^{\left( r\right) }.\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <msubsup> <mi>a</mi> <mrow> <mi>n</mi> <mo>,</mo> <mi>l</mi> </mrow> <mfenced close=")" open="("> <mi>r</mi> </mfenced> </msubsup> <mo>.</mo> </mrow> </math></EquationSource> </InlineEquation></p>

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On the evaluation of some series attached to skew-hyperharmonic numbers

  • Merve Mutluer,
  • Mehmet Cicimen,
  • Pınar Aytaç

摘要

In this study, we first obtain a closed form expression for the Euler sums of skew-hyperharmonic numbers \({\widetilde{h}}_{n}^{\left( r\right) },\) h ~ n r , which are defined as similar to the hyperharmonic numbers \(h_{n}^{\left( r\right) }\) h n r in all respects. We then give a representation for the Euler-type sum of the numbers \(a_{n,l}^{\left( 1\right) },\) a n , l 1 , where \(a_{n,l}^{\left( r\right) }={\widetilde{h}}_{n}^{\left( r\right) }\genfrac(){0.0pt}0{n+l}{l}^{-1}\) a n , l r = h ~ n r n + l l - 1 with \({\widetilde{h}}_{n}^{\left( 1\right) }={\widetilde{H}}_{n},\) h ~ n 1 = H ~ n , the nth skew-harmonic number. This representation enables us to show that the Euler-type sum of the numbers \(a_{n,l}^{\left( r\right) }\) a n , l r can be expressed in terms of zeta values and harmonic numbers. Finally, we investigate the Dirichlet-type generating functions of the numbers \(a_{n,l}^{\left( r\right) }.\) a n , l r .