a(n) = coefficient of x^(2*n-1)*y^(2*n)/(2*n-1)! in Log( Sum_{n>=0} (n^2 + y^2)^n * x^n/n! ), for n>=1.
A318634
a(n) = coefficient of x^(2*n-1)*y^(2*n)/(2*n-1)! in Log( Sum_{n>=0} (n^2 + y^2)^n * x^n/n! ), for n>=1.
Terms
- a(0) =1a(1) =6a(2) =480a(3) =122640a(4) =66044160a(5) =61482516480
External references
- oeis: A318634