G.f. A(x) satisfies A(x) = 1 / ((1 - 3 * x) * (1 - x * A(x)^2)).
A349534
G.f. A(x) satisfies A(x) = 1 / ((1 - 3 * x) * (1 - x * A(x)^2)).
Terms
- a(0) =1a(1) =4a(2) =21a(3) =138a(4) =1063a(5) =9075a(6) =82770a(7) =789204a(8) =7766721a(9) =78267306a(10) =803447526a(11) =8371413999a(12) =88300495746a(13) =941004684748
External references
- oeis: A349534