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 A063692 #4 May 10 2013 12:44:50 %S A063692 1,2,2,7,11,25,43,106,180,453,797,2023,3632,9328,16960,44036,80989, %T A063692 211815,393098,1034958,1934813,5121356,9633260,25615432,48433926, %U A063692 129289382,245554773,657691061,1253974468,3368475942,6444250241 %N A063692 Number of 2-trees rooted at a triangle with two similar edges. %D A063692 F. Harary and E. M. Palmer, Graphical Enumeration, Academic Press, NY, 1973, p. 76, Eq. (3.5.16). %Y A063692 Cf. A005750, A058870, A058866, A054581. %K A063692 nonn %O A063692 2,2 %A A063692 _Vladeta Jovovic_, Aug 23 2001