a(n) = (n+8)*a(n-1) + (n-1)*a(n-2), a(-1)=0, a(0)=1.
A176735
a(n) = (n+8)*a(n-1) + (n-1)*a(n-2), a(-1)=0, a(0)=1.
Terms
- a(0) =1a(1) =9a(2) =91a(3) =1019a(4) =12501a(5) =166589a(6) =2394751a(7) =36920799a(8) =607496041a(9) =10622799089a(10) =196677847971
External references
- oeis: A176735