G.f. A(x) satisfies: A(x) = 1 + x * A(x)^3 / (1 - 3 * x).
A349531
G.f. A(x) satisfies: A(x) = 1 + x * A(x)^3 / (1 - 3 * x).
Terms
- a(0) =1a(1) =1a(2) =6a(3) =39a(4) =271a(5) =1986a(6) =15171a(7) =119694a(8) =968589a(9) =7997970a(10) =67132164a(11) =571138362a(12) =4914229293a(13) =42690269053a(14) =373915274505
External references
- oeis: A349531