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<?php // The magic three sequence is the sum of the previous three values minus 1. // // 0,1,1,1,2,3,5, // // assume $n >= 0 function magicThree($n) { $n--; // To an index; $s = array(0,1,1,1); if ($n > 3) { for ($i = 0; $i < $n; $i++) { $s[$i] = $s[$i-1] + $s[$i-2] + $s[$i-3] - 1; } } else { $result = $s[$n]; } print $result; } magicThree(5); ?>
Output for git.master, git.master_jit, rfc.property-hooks
Warning: Undefined array key -1 in /in/lsdte on line 19 Warning: Undefined array key -2 in /in/lsdte on line 19 Warning: Undefined array key -3 in /in/lsdte on line 19 Warning: Undefined array key -1 in /in/lsdte on line 19 Warning: Undefined array key -2 in /in/lsdte on line 19 Warning: Undefined array key -1 in /in/lsdte on line 19 Warning: Undefined variable $result in /in/lsdte on line 27

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