a(0) = 0, a(1) = 1, a(n) = n! * a(n-1) + a(n-2).
A304727
a(0) = 0, a(1) = 1, a(n) = n! * a(n-1) + a(n-2).
Terms
- a(0) =0a(1) =1a(2) =2a(3) =13a(4) =314a(5) =37693a(6) =27139274a(7) =136781978653
External references
- oeis: A304727
A304727
a(0) = 0, a(1) = 1, a(n) = n! * a(n-1) + a(n-2).