A363480 G.f. satisfies A(x) = exp( Sum_{k>=1} A(2*x^k)^2 * x^k/k ).
1, 1, 5, 49, 923, 32603, 2198413, 288677317, 74816592016, 38536646525164, 39578607089767640, 81176446754286348780, 332742981886258629407221, 2726830211640382050679262877, 44684572695377447660556579448947
Offset: 0
Keywords
Programs
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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);
Formula
G.f.: sqrt(B(x)) where B(x) is the g.f. of A363481.