G.f.: 1 = Sum_{n>=0} a(n)*x^n/(1+x)^(2*2^n).
A137157
G.f.: 1 = Sum_{n>=0} a(n)*x^n/(1+x)^(2*2^n).
Terms
- a(0) =1a(1) =2a(2) =5a(3) =24a(4) =239a(5) =4920a(6) =206727a(7) =17568408a(8) =3003763243
External references
- oeis: A137157
A137157
G.f.: 1 = Sum_{n>=0} a(n)*x^n/(1+x)^(2*2^n).