G.f. A(x) satisfies A(x) = 1 + x * A(x)^4 * (2 + A(x)).
A336540
G.f. A(x) satisfies A(x) = 1 + x * A(x)^4 * (2 + A(x)).
Terms
- a(0) =1a(1) =3a(2) =39a(3) =705a(4) =14799a(5) =338430a(6) =8181597a(7) =205655304a(8) =5320853535a(9) =140761481673
External references
- oeis: A336540