G.f. A(x) satisfies A(x) = ( (1 + x*A(x))/(1 - x*A(x)^3) )^2.
A379252
G.f. A(x) satisfies A(x) = ( (1 + x*A(x))/(1 - x*A(x)^3) )^2.
Terms
- a(0) =1a(1) =4a(2) =40a(3) =572a(4) =9552a(5) =174004a(6) =3352440a(7) =67171500a(8) =1385457568a(9) =29220437860a(10) =627287390664
External references
- oeis: A379252