G.f.: exp( Sum_{n>=1} 3 * Jacobsthal(n)^n * x^n/n ), where Jacobsthal(n) = A001045(n).
A211893
G.f.: exp( Sum_{n>=1} 3 * Jacobsthal(n)^n * x^n/n ), where Jacobsthal(n) = A001045(n).
Terms
- a(0) =1a(1) =3a(2) =6a(3) =36a(4) =561a(5) =98211a(6) =43176384a(7) =116622937722
External references
- oeis: A211893