G.f.: A(x) = exp( Sum_{n>=1} A000204(n)^n * x^n/n ), a power series in x with integer coefficients.
A156216
G.f.: A(x) = exp( Sum_{n>=1} A000204(n)^n * x^n/n ), a power series in x with integer coefficients.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =26a(4) =634a(5) =32928a(6) =5704263a(7) =2470113915
External references
- oeis: A156216