G.f.: A(x) = exp( Sum_{n>=1} 2*((3^n-1)/2)^(n-1)*x^n/n ).
A181316
G.f.: A(x) = exp( Sum_{n>=1} 2*((3^n-1)/2)^(n-1)*x^n/n ).
Terms
- a(0) =1a(1) =2a(2) =6a(3) =122a(4) =32242a(5) =85808250
External references
- oeis: A181316
A181316
G.f.: A(x) = exp( Sum_{n>=1} 2*((3^n-1)/2)^(n-1)*x^n/n ).