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.
%I A145622 #4 Mar 31 2012 10:22:14
%S A145622 2,12,20,40,72,792,10296,102960,583440,11085360,3695120,254963280,
%T A145622 1274816400,11473347600,332727080400,20629078984800,20629078984800,
%U A145622 20629078984800,763275922437600,763275922437600,31294312819941600
%N A145622 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 A145622 For numerators see A145621. For general properties of A_l(x) see A145609.
%t A145622 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 A145622 Cf. A145609 - A145640.
%K A145622 frac,nonn
%O A145622 1,1
%A A145622 _Artur Jasinski_, Oct 14 2008
%E A145622 Edited by _R. J. Mathar_, Aug 21 2009