A145630 Denominator of the polynomial A_l(x) = sum_{d=1..l-1} x^(l-d)/d for index l=2n+1 evaluated at x=11.
2, 12, 60, 840, 2520, 2520, 32760, 65520, 1113840, 4232592, 4232592, 97349616, 2433740400, 7301221200, 211735414800, 13127595717600, 13127595717600, 13127595717600, 485721041551200, 485721041551200, 19914562703599200
Offset: 1
Programs
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Mathematica
m = 11; aa = {}; Do[k = 0; Do[k = k + m^(2 r + 1 - d)/d, {d, 1, 2 r}]; AppendTo[aa, Denominator[k]], {r, 1, 30}]; aa (*Artur Jasinski*)
Extensions
Edited by R. J. Mathar, Aug 21 2009
Comments