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 A063412 #7 May 10 2013 12:44:50
%S A063412 0,0,0,0,0,3413114880,27741797744640,1358238417577574400,
%T A063412 158642247173060689920000,19305274051251991346235310080,
%U A063412 12592116839628085308180342547415040
%N A063412 Number of cyclic subgroups of order 9 of general affine group AGL(n,2).
%C A063412 Number of cyclic subgroups of order m in general affine group AGL(n,2) is 1/phi(m)*Sum_{d|m} mu(m/d)*b(n,d), where b(n,d) is number of solutions to x^d=1 in AGL(n,2).
%H A063412 V. Jovovic, <a href="/A062766/a062766.pdf">Cycle index of general affine group AGL(n,2)</a>
%F A063412 a(n) = (A063392(n)-A063386(n))/6.
%Y A063412 Cf. A063406-A063413, A063385-A063393, A062710.
%K A063412 nonn
%O A063412 1,6
%A A063412 _Vladeta Jovovic_, Jul 17 2001