G.f. A(x) satisfies A(x) = 1 + x * A(3 * x / (1 - x)) / (1 - x).
A355081
G.f. A(x) satisfies A(x) = 1 + x * A(3 * x / (1 - x)) / (1 - x).
Terms
- a(0) =1a(1) =1a(2) =4a(3) =43a(4) =1279a(5) =108472a(6) =26888677a(7) =19761575473
External references
- oeis: A355081