G.f.: A(x) = F(x*G(x)^3) where F(x) = G(x/F(x)) = 1 + x*F(x)^3 is the g.f. of A001764 and G(x) = F(x*G(x)) = 1 + x*G(x)^4 is the g.f. of A002293.

A153399

G.f.: A(x) = F(x*G(x)^3) where F(x) = G(x/F(x)) = 1 + x*F(x)^3 is the g.f. of A001764 and G(x) = F(x*G(x)) = 1 + x*G(x)^4 is the g.f. of A002293.

Terms

    a(0) =1a(1) =1a(2) =6a(3) =45a(4) =371a(5) =3225a(6) =29007a(7) =267239a(8) =2506605a(9) =23842644a(10) =229369064a(11) =2227345899a(12) =21801617643a(13) =214862158025

External references