G.f. A(x) satisfies: 1 = Sum_{n>=0} x^n * ((1 + 3*x)^n - A(x))^(n+1), where A(0) = 0.
A325583
G.f. A(x) satisfies: 1 = Sum_{n>=0} x^n * ((1 + 3*x)^n - A(x))^(n+1), where A(0) = 0.
Terms
- a(0) =1a(1) =5a(2) =10a(3) =80a(4) =568a(5) =4220a(6) =38692a(7) =369602a(8) =3829789a(9) =42483419a(10) =498335248a(11) =6168187340a(12) =80190252964
External references
- oeis: A325583