G.f.: A(x) = exp( Sum_{n>=1} (1 + 2^n*x)^n * x^n/n ).
A156100
G.f.: A(x) = exp( Sum_{n>=1} (1 + 2^n*x)^n * x^n/n ).
Terms
- a(0) =1a(1) =1a(2) =3a(3) =7a(4) =25a(5) =113a(6) =741a(7) =7181a(8) =101139a(9) =2089283a(10) =61683087a(11) =2600572391a(12) =156100460443
External references
- oeis: A156100