a(n) = - (a(n-1) + 1) * a(n-2) with a(1) = a(2) = 1.
A243004
a(n) = - (a(n-1) + 1) * a(n-2) with a(1) = a(2) = 1.
Terms
- a(0) =1a(1) =1a(2) =-2a(3) =1a(4) =4a(5) =-5a(6) =16a(7) =85a(8) =-1376a(9) =116875a(10) =160821376
External references
- oeis: A243004