a(n) = Sum_{k=0..n-1} (-1)^k * binomial(n,k)^2 * (n-k-1)!.
A352150
a(n) = Sum_{k=0..n-1} (-1)^k * binomial(n,k)^2 * (n-k-1)!.
Terms
- a(0) =0a(1) =1a(2) =-3a(3) =2a(4) =-6a(5) =-1a(6) =-5a(7) =132a(8) =1624a(9) =17145a(10) =174509a(11) =1789842a(12) =18659146a(13) =196678143a(14) =2057524963a(15) =20460314396a(16) =171030108768a(17) =529697015489
External references
- oeis: A352150