E.g.f. exp(2x)/(1-3x).

A097817

E.g.f. exp(2x)/(1-3x).

Terms

    a(0) =1a(1) =5a(2) =34a(3) =314a(4) =3784a(5) =56792a(6) =1022320a(7) =21468848a(8) =515252608a(9) =13911820928a(10) =417354628864

External references