# Negafibonacci numbers?

The Fibonacci numbers are given by

• $F(0) = 0$
• $F(1) = 1$
• $F(n) = F(n-1) + F(n-2).$

So, the first few are $0, 1, 1, 2, 3, 5, 8, 13.$

If we generalize this to negative numbers, what is $F(-8)?$

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