a(n) = (n^5 - n^4 - n^3 + n^2 - 1)*a(n-5) for n > 4, otherwise n!.
A123150
a(n) = (n^5 - n^4 - n^3 + n^2 - 1)*a(n-5) for n > 4, otherwise n!.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =6a(4) =24a(5) =2399a(6) =6299a(7) =28222a(8) =169338a(9) =1244136a(10) =213748501a(11) =914608501a(12) =6392593442a(13) =57693964614a(14) =618160168824
External references
- oeis: A123150