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

A211895

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

Terms

    a(0) =1a(1) =3a(2) =6a(3) =36a(4) =186a(5) =1254a(6) =8208a(7) =57540a(8) =404619a(9) =2913705a(10) =21146694a(11) =155231256a(12) =1147302756a(13) =8538393900a(14) =63879354096a(15) =480212156664

External references