Damn... and here I am trying to refactor it... I even got as far as: F(n) = F(n-1) + F(n+2) -> F(n) + F(n-3) = F(n-2) --> F(n) = F(n-2) - F(n-3) so

Damn... and here I am trying to refactor it... I even got as far as: F(n) = F(n-1) + F(n+2) -> F(n) + F(n-3) = F(n-2) --> F(n) = F(n-2) - F(n-3) so with F(0) = 0 and F(1) = 1 it gives F(3) = 1, but then you kinda need to figure out what F(2) may be... Oh well, on to the next problem then.