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A002517 Earliest sequence with a(a(n))=3n. +0
9
0, 2, 3, 6, 5, 12, 9, 8, 21, 18, 11, 30, 15, 14, 39, 36, 17, 48, 27, 20, 57, 24, 23, 66, 63, 26, 75, 54, 29, 84, 33, 32, 93, 90, 35, 102, 45, 38, 111, 42, 41, 120, 117, 44, 129, 108, 47, 138, 51, 50, 147, 144, 53, 156, 81, 56, 165, 60, 59, 174, 171, 62, 183, 72, 65, 192 (list; graph; listen)
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Last modified December 6 22:55 EST 2009. Contains 170429 sequences.


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