a(n) = n! * [x^n] Product_{k>=1} (1 + x^k/k!)^n.
A319175
a(n) = n! * [x^n] Product_{k>=1} (1 + x^k/k!)^n.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =36a(4) =416a(5) =6000a(6) =106542a(7) =2242093a(8) =54399424a(9) =1495318752a(10) =45938780750
External references
- oeis: A319175