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 A134354 #2 Mar 31 2012 10:22:05
%S A134354 1,4,34,553,13929,504211,24804343,1592201163,129266762933,
%T A134354 12950610156346,1569397748147942,226278584786787360,
%U A134354 38281932323382968320,7510129222684065660928,1691120063240224255246336
%N A134354 Integer nearest to expression 2 Pi n^(2 n + 1) e^(-2 n).
%C A134354 Integers in this sequence are <= (n!)^2 (see A001044)
%F A134354 a(n) = Round[2 Pi n^(2 n + 1)E^(-2 n)]
%t A134354 Table[Round[N[2 Pi n^(2 n + 1)E^(-2 n)]], {n, 1, 30}]
%Y A134354 Cf. A001044, A134354.
%K A134354 nonn
%O A134354 1,2
%A A134354 _Artur Jasinski_, Oct 22 2007