G.f. A(x) satisfies A(x) = 1 / ((1 + x) * (1 - 3 * x * A(x)^2)).
A349256
G.f. A(x) satisfies A(x) = 1 / ((1 + x) * (1 - 3 * x * A(x)^2)).
Terms
- a(0) =1a(1) =2a(2) =19a(3) =206a(4) =2563a(5) =34415a(6) =486370a(7) =7128488a(8) =107364421a(9) =1651615568a(10) =25840137724a(11) =409898503763
External references
- oeis: A349256