G.f. A(x) satisfies A057083(x*A(x)) = A(x) and so equals the ratio of the g.f.s of any two adjacent diagonals of triangle A097186.

A097188

G.f. A(x) satisfies A057083(x*A(x)) = A(x) and so equals the ratio of the g.f.s of any two adjacent diagonals of triangle A097186.

Terms

    a(0) =1a(1) =3a(2) =15a(3) =90a(4) =594a(5) =4158a(6) =30294a(7) =227205a(8) =1741905a(9) =13586859a(10) =107459703a(11) =859677624a(12) =6943550040a(13) =56540336040a(14) =463630755528

External references