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 A176475 #2 Mar 30 2012 17:31:29
%S A176475 0,1,2,8,24,136,960,5312,40320,491776,4112640,40270592,638668800,
%T A176475 6249389056,91883151360,1919826163712,20922789888000,355897293438976,
%U A176475 8676514912665600,121674189293944832,2757288942600192000
%N A176475 The coefficients (times n!) of the expansion of the sum {k=1 to Inf.} of Tan(x^n).
%t A176475 Range[0, 25]! CoefficientList[ Series[ Sum[ Tan[x^n], {n, 35}], {x, 0, 25}], x]
%Y A176475 Cf. A176473, A176474.
%K A176475 nonn
%O A176475 1,3
%A A176475 _Robert G. Wilson v_, Apr 18 2010