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 A132640 #4 May 18 2013 14:33:39 %S A132640 1,1,1,4,27,46656,285311670611,20880467999847912034355032910567, %T A132640 3877924263464448622666648186154330754898344901344205917642325627886496385062863 %N A132640 Number of trees with n unlabeled nodes T(n) raised to power T(n). %Y A132640 Number of trees with n unlabeled nodes: A000055. %Y A132640 Cf. A008973, A008974, A051674. %K A132640 nonn %O A132640 1,4 %A A132640 _Omar E. Pol_, Aug 24 2007