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

%S 2,12,20,40,72,792,10296,102960,583440,11085360,3695120,254963280,

%T 1274816400,11473347600,332727080400,20629078984800,20629078984800,

%U 20629078984800,763275922437600,763275922437600,31294312819941600

%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=7.

%C For numerators see A145621. For general properties of A_l(x) see A145609.

%t m = 7; 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