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Search: id:A001344
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| A001344 |
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Sum (n+k)! C(2,k), k = 0 . . 2. (Formerly M1405 N0548)
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+0 2
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| 2, 5, 11, 38, 174, 984, 6600, 51120, 448560, 4394880, 47537280, 562464000, 7224940800, 100111334400, 1488257971200, 23625316915200, 398840682240000, 7134671351808000
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