a(n) = (n!)^2 * [(x*y)^n] Product_{k>=1} 1 / (1 - (x^k + y^k)/k!).
A382958
a(n) = (n!)^2 * [(x*y)^n] Product_{k>=1} 1 / (1 - (x^k + y^k)/k!).
Terms
- a(0) =1a(1) =2a(2) =30a(3) =920a(4) =53078a(5) =4828892a(6) =643086588a(7) =117718532696
External references
- oeis: A382958