G.f. satisfies: A(x) = (x + A(A(x)))^2 where g.f. A(x) = Sum_{n>=1} a(n)*x^(3*n-1).
A212392
G.f. satisfies: A(x) = (x + A(A(x)))^2 where g.f. A(x) = Sum_{n>=1} a(n)*x^(3*n-1).
Terms
- a(0) =1a(1) =2a(2) =9a(3) =56a(4) =400a(5) =3096a(6) =25256a(7) =213832a(8) =1861272a(9) =16552320a(10) =149737632a(11) =1373597892a(12) =12747475260a(13) =119465392536
External references
- oeis: A212392