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<?php function fib($n) { return ((4 << $n*(3+$n)) / ((4 << 2*$n) - (2 << $n) - 1) & ((2 << $n) - 1)); } for ($i = 10; $i < 20; $i++) { echo "Fib {$i}: " . fib($i) . "\n"; }
Output for git.master, git.master_jit, rfc.property-hooks
Fib 10: 0 Fib 11: 0 Fib 12: 0 Fib 13: 0 Fib 14: 0 Fib 15: 0 Fib 16: 0 Fib 17: 0 Fib 18: 0 Fib 19: 0

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