G.f. satisfies A(x) = 1 + x*(A(x)^2 + 2*A(x)^3).
A219536
G.f. satisfies A(x) = 1 + x*(A(x)^2 + 2*A(x)^3).
Terms
- a(0) =1a(1) =3a(2) =24a(3) =255a(4) =3102a(5) =40854a(6) =566934a(7) =8164263a(8) =120864390a(9) =1827982362a(10) =28122626760a(11) =438720097638
External references
- oeis: A219536