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A130110 Rearrangement of natural numbers such that each four terms sum up to a perfect square. +0
4
1, 2, 3, 10, 4, 5, 6, 21, 7, 8, 9, 12, 11, 13, 14, 26, 15, 16, 17, 33, 18, 19, 20, 24, 22, 23, 25, 30, 27, 28, 29, 37, 31, 32, 34, 47, 35, 36, 38, 60, 39, 40, 41, 49, 42, 43, 44, 67, 45, 46, 48, 57, 50, 51, 52, 72, 53, 54, 55, 63, 56, 58, 59, 83, 61, 62, 64, 69, 65, 66, 68, 90 (list; graph; listen)
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Last modified December 2 11:54 EST 2009. Contains 167921 sequences.


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