Expansion of 1/((1-3x*c(x))(1-x^2*c(x))), c(x) the g.f. of A000108.

A117376

Expansion of 1/((1-3x*c(x))(1-x^2*c(x))), c(x) the g.f. of A000108.

Terms

    a(0) =1a(1) =3a(2) =13a(3) =55a(4) =240a(5) =1057a(6) =4688a(7) =20879a(8) =93250a(9) =417272a(10) =1869725a(11) =8386137a(12) =37640961a(13) =169042436a(14) =759470361a(15) =3413223919a(16) =15343588991a(17) =68988110756a(18) =310233741889

External references