a(n) = (a(n-1) - a(n-2)) * a(n-1) / a(n-3) with a(0) = 2, a(1) = 1, a(2) = -1.
A243005
a(n) = (a(n-1) - a(n-2)) * a(n-1) / a(n-3) with a(0) = 2, a(1) = 1, a(2) = -1.
Terms
- a(0) =2a(1) =1a(2) =-1a(3) =1a(4) =2a(5) =-2a(6) =8a(7) =40a(8) =-640a(9) =54400a(10) =74854400
External references
- oeis: A243005