a(n) = n! * Sum_{k=0..n} (-k * (n-k))^k/k!.
A351796
a(n) = n! * Sum_{k=0..n} (-k * (n-k))^k/k!.
Terms
- a(0) =1a(1) =1a(2) =0a(3) =6a(4) =36a(5) =-1240a(6) =36810a(7) =-743568a(8) =-4441640a(9) =2126086272a(10) =-201265464330
External references
- oeis: A351796