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 A036674 #6 Jul 08 2025 21:53:46 %S A036674 0,0,0,0,0,0,0,0,0,1,1,4,10,30,78,221,590,1619,4366,11858,32029,86744, %T A036674 234487,634630,1717133,4649560,12593571,34133104,92560816,251166524, %U A036674 681957954,1852822658,5037107601,13702625939,37298828081 %N A036674 G.f.: A(x) = (1/2)*x*(B(x)^2+B(x^2)), where B(x) = g.f. for A000600. %K A036674 nonn %O A036674 0,12 %A A036674 _N. J. A. Sloane_