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 A134355 #2 Mar 31 2012 10:22:05
%S A134355 0,0,2,23,471,14189,597257,33501237,2415131467,217579283654,
%T A134355 23953174092058,3163948015772640,493855720249671680,
%U A134355 89925233867931779072,18892189483975198113792,4535777807395775857033216
%N A134355 A001044(n)-A134354(n).
%F A134355 a(n)=A001044(n)-A134354(n)
%t A134355 Table[Round[N[(n!)^2 - 2*Pi*n*E^(-2*n)*n^(2*n)]], {n, 1, 100}]
%Y A134355 Cf. A001044, A134354.
%K A134355 nonn
%O A134355 1,3
%A A134355 _Artur Jasinski_, Oct 22 2007