L.g.f.: A(x) = Sum_{n>=1} a(n)*x^n/n = Sum_{n>=1} (1 + 2^n*x)^n*x^n/n .
A156101
L.g.f.: A(x) = Sum_{n>=1} a(n)*x^n/n = Sum_{n>=1} (1 + 2^n*x)^n*x^n/n .
Terms
- a(0) =1a(1) =5a(2) =13a(3) =65a(4) =401a(5) =3521a(6) =43457a(7) =738305a(8) =17746177a(9) =593695745a(10) =27878501377
External references
- oeis: A156101