G.f. A(x) satisfies: A(x) = (1 + x*A(x))*(1 + 2*x*A(x))*(1 + 3*x*A(x)) / (1 - x*A(x))^3.
A341964
G.f. A(x) satisfies: A(x) = (1 + x*A(x))*(1 + 2*x*A(x))*(1 + 3*x*A(x)) / (1 - x*A(x))^3.
Terms
- a(0) =1a(1) =9a(2) =116a(3) =1759a(4) =29240a(5) =515586a(6) =9472148a(7) =179354443a(8) =3475611320a(9) =68596806526
External references
- oeis: A341964