G.f. satisfies: A(x/A(x)) = C(x)^2 where C(x) = 1 + x*C(x)^2 is the g.f. of the Catalan numbers (A000108).
A168449
G.f. satisfies: A(x/A(x)) = C(x)^2 where C(x) = 1 + x*C(x)^2 is the g.f. of the Catalan numbers (A000108).
Terms
- a(0) =1a(1) =2a(2) =9a(3) =60a(4) =520a(5) =5450a(6) =65830a(7) =886466a(8) =13005906a(9) =204607622a(10) =3412713687a(11) =59858823020
External references
- oeis: A168449