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 A181504 #2 Mar 31 2012 14:40:18 %S A181504 720,32760,1095360,33974640,1054196640,33765565680,1132318630080, %T A181504 40012680759480,1493837702076720,58961961488790360, %U A181504 2459382489787466880,108300904378742056800,5028206935516237005120 %N A181504 A000272(n+1) - A000951(n), n >= 6. Number of forests of rooted labeled trees with n nodes and height >= 5. %F A181504 a(n) = A000272(n+1) - A000951(n), n >= 6. %Y A181504 Cf. A000272, A000951. %K A181504 nonn %O A181504 6,1 %A A181504 _Washington Bomfim_, Oct 24 2010