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 A363480 #8 Jun 04 2023 12:07:10
%S A363480 1,1,5,49,923,32603,2198413,288677317,74816592016,38536646525164,
%T A363480 39578607089767640,81176446754286348780,332742981886258629407221,
%U A363480 2726830211640382050679262877,44684572695377447660556579448947
%N A363480 G.f. satisfies A(x) = exp( Sum_{k>=1} A(2*x^k)^2 * x^k/k ).
%F A363480 G.f.: sqrt(B(x)) where B(x) is the g.f. of A363481.
%o A363480 (PARI) seq(n) = my(A=1); for(i=1, n, A=exp(sum(k=1, i, subst(A, x, 2*x^k)^2*x^k/k)+x*O(x^n))); Vec(A);
%Y A363480 Cf. A005750, A179470, A363481.
%K A363480 nonn
%O A363480 0,3
%A A363480 _Seiichi Manyama_, Jun 04 2023