G.f. A(x) satisfies 1/2 = Sum_{n=-oo..+oo} x^n * (A(x) + x^n)^(2*n-1).
A380068
G.f. A(x) satisfies 1/2 = Sum_{n=-oo..+oo} x^n * (A(x) + x^n)^(2*n-1).
Terms
- a(0) =1a(1) =4a(2) =36a(3) =312a(4) =3440a(5) =40956a(6) =518160a(7) =6806320a(8) =92021528a(9) =1271748364a(10) =17886165344a(11) =255159368504
External references
- oeis: A380068