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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.
1

%I #4 Mar 31 2012 10:22:14

%S 2,12,60,840,2520,2520,32760,65520,1113840,4232592,4232592,97349616,

%T 2433740400,7301221200,211735414800,13127595717600,13127595717600,

%U 13127595717600,485721041551200,485721041551200,19914562703599200

%N 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.

%C For numerators see A145628. For general properties of A_l(x) see A145609.

%t 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*)

%Y Cf. A145609 - A145640.

%K frac,nonn

%O 1,1

%A _Artur Jasinski_, Oct 14 2008

%E Edited by _R. J. Mathar_, Aug 21 2009