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A140778 a(n) is the smallest positive integer such that no number occurs twice in the sequence and its absolute first differences. +0
3
1, 3, 7, 12, 18, 8, 17, 28, 13, 27, 43, 19, 39, 60, 22, 45, 70, 26, 55, 85, 31, 63, 96, 34, 69, 105, 37, 77, 118, 42, 88, 135, 48, 97, 147, 52, 103, 156, 56, 113, 171, 59, 120, 184, 65, 131, 198, 71, 143, 216, 74, 149, 227, 79, 159, 240, 82, 165, 249, 86, 175, 265, 91, 183 (list; graph; listen)
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Last modified December 20 16:54 EST 2009. Contains 171081 sequences.


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