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 A102578 #5 Mar 30 2012 16:50:10 %S A102578 1,45,80,90,144 %N A102578 a(n) = number of elements of order n in simple group Alt(6) = L_2(9) of order 360. %Y A102578 Cf. A031963. A row of A057740. %K A102578 nonn,fini,full %O A102578 1,2 %A A102578 _N. J. A. Sloane_, Apr 06 2009