E.g.f: Sum_{n>=0} 3^(n^2) * exp(3^n*x) * x^n/n!.
A202989
E.g.f: Sum_{n>=0} 3^(n^2) * exp(3^n*x) * x^n/n!.
Terms
- a(0) =1a(1) =4a(2) =100a(3) =21952a(4) =45212176a(5) =864866612224
External references
- oeis: A202989
A202989
E.g.f: Sum_{n>=0} 3^(n^2) * exp(3^n*x) * x^n/n!.