a(n) = n! * (1 + Sum_{k=0..n} (-1)^k * binomial(k+3,4) / k!).
A368768
a(n) = n! * (1 + Sum_{k=0..n} (-1)^k * binomial(k+3,4) / k!).
Terms
- a(0) =1a(1) =0a(2) =5a(3) =0a(4) =35a(5) =105a(6) =756a(7) =5082a(8) =40986a(9) =368379a(10) =3684505a(11) =40528554a(12) =486344013a(13) =6322470349a(14) =88514587266
External references
- oeis: A368768