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

A301578

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

Terms

    a(0) =1a(1) =1a(2) =3a(3) =12a(4) =48a(5) =211a(6) =970a(7) =4594a(8) =22311a(9) =110473a(10) =555561a(11) =2829918a(12) =14570666a(13) =75708835a(14) =396481070a(15) =2090558864a(16) =11089276706a(17) =59135014252a(18) =316836936662

External references