G.f.: exp( Sum_{n>=1} A002426(n)^n * x^n/n ), where A002426(n) is the central trinomial coefficients.
A168599
G.f.: exp( Sum_{n>=1} A002426(n)^n * x^n/n ), where A002426(n) is the central trinomial coefficients.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =119a(4) =32707a(5) =69038213
External references
- oeis: A168599