G.f.: A(x) = exp( Sum_{n>=1} 2^(n^2)*C(2*n-1,n)*x^n/n ), a power series in x with integer coefficients.
A156213
G.f.: A(x) = exp( Sum_{n>=1} 2^(n^2)*C(2*n-1,n)*x^n/n ), a power series in x with integer coefficients.
Terms
- a(0) =1a(1) =2a(2) =26a(3) =1756a(4) =577190a(5) =846763548
External references
- oeis: A156213