G.f. satisfies: A(x) = exp(Sum_{n>=1} x^n*A(x)^n/n * Product_{k>=1} (1 + x^(n*k)*A(x^k)^n)).

A219260

G.f. satisfies: A(x) = exp(Sum_{n>=1} x^n*A(x)^n/n * Product_{k>=1} (1 + x^(n*k)*A(x^k)^n)).

Terms

    a(0) =1a(1) =1a(2) =3a(3) =10a(4) =37a(5) =143a(6) =576a(7) =2393a(8) =10178a(9) =44133a(10) =194341a(11) =866867a(12) =3908454a(13) =17784385a(14) =81562890a(15) =376637216a(16) =1749704080a(17) =8171760933a(18) =38346326963a(19) =180707395127a(20) =854850922373

External references