a(n) = (1/n) * [x^n] 1/(1 - n^2*x)^(1/n), where [x^n] F(x) denotes the coefficient of x^n in F(x).
A195010
a(n) = (1/n) * [x^n] 1/(1 - n^2*x)^(1/n), where [x^n] F(x) denotes the coefficient of x^n in F(x).
Terms
- a(0) =1a(1) =3a(2) =42a(3) =1560a(4) =115500a(5) =14471730a(6) =2766499428a(7) =751812526080
External references
- oeis: A195010