fibonacci :: Int -> Int -- testing 7 combinations of argument values -- pruning with 21/44 rules -- 4 candidates of size 1 -- 0 candidates of size 2 -- 7 candidates of size 3 -- 0 candidates of size 4 -- 18 candidates of size 5 -- 0 candidates of size 6 -- 94 candidates of size 7 -- 20 candidates of size 8 -- 466 candidates of size 9 -- 92 candidates of size 10 -- 2298 candidates of size 11 -- 542 candidates of size 12 -- tested 3531 candidates fibonacci 0 = 1 fibonacci 1 = 1 fibonacci x = fibonacci (x - 1) + fibonacci (x - 2)