a(n) = n! + (n - 1)! + (n - 2)! + n - 3.
A376269
a(n) = n! + (n - 1)! + (n - 2)! + n - 3.
Terms
- a(0) =3a(1) =9a(2) =33a(3) =152a(4) =867a(5) =5884a(6) =46085a(7) =408246a(8) =4032007a(9) =43908488a(10) =522547209a(11) =6745939210a(12) =93884313611
External references
- oeis: A376269