G.f. A(x) satisfies A(x) = (1 + x*A(x)^3 / (1-x))^2.
A371523
G.f. A(x) satisfies A(x) = (1 + x*A(x)^3 / (1-x))^2.
Terms
- a(0) =1a(1) =2a(2) =15a(3) =142a(4) =1533a(5) =17924a(6) =220936a(7) =2827218a(8) =37202580a(9) =500228562a(10) =6842899886a(11) =94931338876
External references
- oeis: A371523