G.f. A(x) satisfies: 5*A(x) = A(A(A(A(x)))) + 4*x + x^2 with A(0)=0.
A138914
G.f. A(x) satisfies: 5*A(x) = A(A(A(A(x)))) + 4*x + x^2 with A(0)=0.
Terms
- a(0) =1a(1) =1a(2) =12a(3) =390a(4) =18304a(5) =1071862a(6) =73349996a(7) =5661162666a(8) =482252816998
External references
- oeis: A138914