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 A179499 #2 Mar 30 2012 18:37:22 %S A179499 1,4,42,768,20680,749040,34497792,1944626432,130528288512, %T A179499 10219233265920,918320724657600,93509880099305472, %U A179499 10677268138244018688,1355273477576934150144,189834913883100796531200 %N A179499 E.g.f. A(x) = G(x)^2/x where G(x) satisfies: G(G(x))^2 = G(x)^2 * G'(x) and G(x) is the g.f. of A179499. %e A179499 E.g.f.: A(x) = x + 4*x^2/2! + 42*x^3/3! + 768*x^4/4! + 20680*x^5/5! +... %Y A179499 Cf. A179497, A179498, A179420. %K A179499 nonn %O A179499 1,2 %A A179499 _Paul D. Hanna_, Jul 31 2010