G.f. satisfies A(x) = ( 1 + x / (1 - x*A(x)^3)^3 )^2.
A371617
G.f. satisfies A(x) = ( 1 + x / (1 - x*A(x)^3)^3 )^2.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =54a(4) =419a(5) =3644a(6) =33366a(7) =317672a(8) =3113559a(9) =31200060a(10) =318219653a(11) =3292546660a(12) =34475311605a(13) =364621943538
External references
- oeis: A371617