a(n) = 2*a(n-1) - a(n-2) - (a(n-1)^2 + a(n-2)^2).

A122590

a(n) = 2*a(n-1) - a(n-2) - (a(n-1)^2 + a(n-2)^2).

Terms

    a(0) =1a(1) =1a(2) =-1a(3) =-5a(4) =-35a(5) =-1315a(6) =-1733045

External references