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Denominator the polynomial A_l(x) = sum_{d=1..l-1} x^(l-d)/d for index l=2n+1 evaluated at x=16.
39

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

%S 1,3,5,35,315,3465,45045,45045,255255,969969,29393,2028117,50702925,

%T 456326325,13233463425,820474732350,4512611027925,4512611027925,

%U 166966608033225,12843585233325,526586994566325,22643240766351975

%N Denominator the polynomial A_l(x) = sum_{d=1..l-1} x^(l-d)/d for index l=2n+1 evaluated at x=16.

%C For numerators see A145639. For general properties of A_l(x) see A145609.

%t m = 16; 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 1,2

%A _Artur Jasinski_, Oct 14 2008

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