A168601 - OEIS

%I #2 Mar 30 2012 18:37:20

%S 1,1,13,577,65737,17553361,10704000277,14796719274961,

%T 46078793355045073,320622833897384770657,4940987529761176087132381,

%U 167239138427197351352909547169,12340269209872740741602975099855641

%N E.g.f. satisfies: A(x) = exp( x*A(2x)^3 ).

%e E.g.f: A(x) = 1 + x + 13*x^2/2! + 577*x^3/3! + 65737*x^4/4! +...

%o (PARI) {a(n)=local(A=1+x+x*O(x^n)); for(i=0, n, A=exp(x*subst(A, x, 2*x)^3) ); n!*polcoeff(A, n)}

%Y Cf. A096538, A168600.

%K nonn

%O 0,3

%A _Paul D. Hanna_, Dec 05 2009