cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

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A145625 Numerator of the polynomial A_l(x) = sum_{d=1..l-1} x^(l-d)/d for index l=2n+1 evaluated at x=9.

Original entry on oeis.org

171, 27819, 11267049, 12776837121, 1034923809573, 922117114354533, 970989321415598469, 31460054013865485891, 43320494377092775505339, 333351204231728907635493393, 27001447542770041518585314553
Offset: 1

Views

Author

Artur Jasinski, Oct 14 2008

Keywords

Comments

For denominators see A145626. For general properties of A_l(x) see A145609.

Crossrefs

Programs

  • Mathematica
    m = 9; aa = {}; Do[k = 0; Do[k = k + m^(2 r + 1 - d)/d, {d, 1, 2 r}]; AppendTo[aa, Numerator[k]], {r, 1, 25}]; aa (* Artur Jasinski *)
    a[n_,m_]:=Integrate[(m-x^n)/(m-x),{x,0,1}]+(m^n-m)Log[m/(m-1)]
    Table[9 a[2 n, 9] // Simplify  // Numerator, {n,1,25}]  (* Gerry Martens , Jun 04 2016 *)

Extensions

Edited by R. J. Mathar, Aug 21 2009
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