a(n) = n! * Sum_{k=0..floor(n/2)} (-n)^k * binomial(n-k,k)/(n-k)!.
A362282
a(n) = n! * Sum_{k=0..floor(n/2)} (-n)^k * binomial(n-k,k)/(n-k)!.
Terms
- a(0) =1a(1) =1a(2) =-3a(3) =-17a(4) =145a(5) =1401a(6) =-19619a(7) =-267833a(8) =5214273a(9) =91975825a(10) =-2292948899a(11) =-49586832129
External references
- oeis: A362282