G.f. A(x) satisfies: 1 = Sum_{n>=0} ( 3*(1+x)^n - A(x) )^n / 3^(n+1).
A303653
G.f. A(x) satisfies: 1 = Sum_{n>=0} ( 3*(1+x)^n - A(x) )^n / 3^(n+1).
Terms
- a(0) =1a(1) =15a(2) =291a(3) =20868a(4) =2501535a(5) =406641390a(6) =82021892979
External references
- oeis: A303653