G.f. satisfies: A(x) = x + 3*x^2 + x*A(A(A(A(x)))).
A215116
G.f. satisfies: A(x) = x + 3*x^2 + x*A(A(A(A(x)))).
Terms
- a(0) =1a(1) =4a(2) =16a(3) =256a(4) =4864a(5) =111616a(6) =2983936a(7) =89743360a(8) =2970861568a(9) =106768629760
External references
- oeis: A215116