G.f. satisfies: A(x) = 1 + x*A(x)^2 + 3*x^2*A'(x)*A(x).
A215648
G.f. satisfies: A(x) = 1 + x*A(x)^2 + 3*x^2*A'(x)*A(x).
Terms
- a(0) =1a(1) =1a(2) =5a(3) =44a(4) =539a(5) =8337a(6) =154632a(7) =3332640a(8) =81711479a(9) =2244563555a(10) =68272834865
External references
- oeis: A215648