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EXAMPLE
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The top left {1..9} x {1..18} corner of the array:
1, 2, 6, 24, 120, 720, 5040, 40320, 362880
3, 8, 30, 144, 840, 5760, 45360, 403200, 3991680
4, 12, 48, 240, 1440, 10080, 80640, 725760, 7257600
5, 14, 54, 264, 1560, 10800, 85680, 766080, 7620480
7, 26, 126, 744, 5160, 41040, 367920, 3669120, 40279680
9, 32, 150, 864, 5880, 46080, 408240, 4032000, 43908480
10, 36, 168, 960, 6480, 50400, 443520, 4354560, 47174400
11, 38, 174, 984, 6600, 51120, 448560, 4394880, 47537280
13, 50, 246, 1464, 10200, 81360, 730800, 7297920, 80196480
15, 56, 270, 1584, 10920, 86400, 771120, 7660800, 83825280
16, 60, 288, 1680, 11520, 90720, 806400, 7983360, 87091200
17, 62, 294, 1704, 11640, 91440, 811440, 8023680, 87454080
18, 72, 360, 2160, 15120, 120960, 1088640, 10886400, 119750400
19, 74, 366, 2184, 15240, 121680, 1093680, 10926720, 120113280
20, 78, 384, 2280, 15840, 126000, 1128960, 11249280, 123379200
21, 80, 390, 2304, 15960, 126720, 1134000, 11289600, 123742080
22, 84, 408, 2400, 16560, 131040, 1169280, 11612160, 127008000
23, 86, 414, 2424, 16680, 131760, 1174320, 11652480, 127370880
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