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 A063409 #7 May 10 2013 12:44:50
%S A063409 0,0,112,33600,17387776,25992336384,82647777759232,833357980338831360,
%T A063409 28526490693606372081664,3614600380702981731403431936,
%U A063409 1544913993707932218852890836467712
%N A063409 Number of cyclic subgroups of order 6 of general affine group AGL(n,2).
%C A063409 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 A063409 V. Jovovic, <a href="/A062766/a062766.pdf">Cycle index of general affine group AGL(n,2)</a>
%F A063409 a(n) = (A063389(n)-A063386(n)-A063385(n)+1)/2.
%Y A063409 Cf. A063406-A063413, A063385-A063393, A062710.
%K A063409 nonn
%O A063409 1,3
%A A063409 _Vladeta Jovovic_, Jul 17 2001