G.f. A(x) satisfies: 3 = Sum_{n>=0} (2/3)^n * (1 + x)^(n^2) / A(x)^n.
A303291
G.f. A(x) satisfies: 3 = Sum_{n>=0} (2/3)^n * (1 + x)^(n^2) / A(x)^n.
Terms
- a(0) =1a(1) =5a(2) =70a(3) =3170a(4) =252160a(5) =27705800a(6) =3806286820a(7) =621124623740
External references
- oeis: A303291