E.g.f.: A(x) = Sum_{n>=0} (3^n + (-1)^n)^n * exp((3^n + (-1)^n)*x) * x^n/n!.
A196458
E.g.f.: A(x) = Sum_{n>=0} (3^n + (-1)^n)^n * exp((3^n + (-1)^n)*x) * x^n/n!.
Terms
- a(0) =1a(1) =4a(2) =112a(3) =20608a(4) =47100160a(5) =848654393344
External references
- oeis: A196458