G.f.: A(x) = exp( Sum_{n>=1} 2^[(n^2+1)/2]*x^n/n ), a power series in x with integer coefficients.

A156335

G.f.: A(x) = exp( Sum_{n>=1} 2^[(n^2+1)/2]*x^n/n ), a power series in x with integer coefficients.

Terms

    a(0) =1a(1) =2a(2) =4a(3) =16a(4) =92a(5) =1816a(6) =47344a(7) =4888640a(8) =546663016a(9) =245429690704

External references