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 A106363 #5 Mar 30 2012 17:37:15 %S A106363 1,1,0,1,0,1,3,7,14,43,115,326,931,2719,7979,23804,71418,216444, %T A106363 660276,2028558,6268350,19479746,60835542,190881085,601459251, %U A106363 1902680249,6040955223,19245061851,61503863732,197135868680,633615135842 %N A106363 Planar trees where no branch is identical to its adjacent neighbor. %H A106363 <a href="/index/Tra#trees">Index entries for sequences related to trees</a> %F A106363 G.f.: A(x) = B(x) + (C(x^2) - C(x)^2)/2. B(x) is g.f. of A106362. C(x) is g.f. of A106361. %Y A106363 Cf. A002995. %K A106363 nonn %O A106363 1,7 %A A106363 _Christian G. Bower_, Apr 29 2005