G.f.: exp( Sum_{n>=1} 3 * Jacobsthal(n)^4 * x^n/n ), where Jacobsthal(n) = A001045(n).

A211896

G.f.: exp( Sum_{n>=1} 3 * Jacobsthal(n)^4 * x^n/n ), where Jacobsthal(n) = A001045(n).

Terms

    a(0) =1a(1) =3a(2) =6a(3) =90a(4) =723a(5) =10689a(6) =130428a(7) =1862580a(8) =25594611a(9) =368313993a(10) =5289203262a(11) =77279744418

External references