G.f.: A(x) = F(x*G(x)^2) 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.

A153398

G.f.: A(x) = F(x*G(x)^2) 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) =5a(3) =33a(4) =245a(5) =1941a(6) =16023a(7) =136075a(8) =1179833a(9) =10392981a(10) =92701411a(11) =835271032a(12) =7589337123a(13) =69444928453a(14) =639280878401

External references