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A061641 Pure numbers in the Collatz (3x+1) iteration. Also called pure hailstone numbers. +0
8
0, 1, 3, 6, 7, 9, 12, 15, 18, 19, 21, 24, 25, 27, 30, 33, 36, 37, 39, 42, 43, 45, 48, 51, 54, 55, 57, 60, 63, 66, 69, 72, 73, 75, 78, 79, 81, 84, 87, 90, 93, 96, 97, 99, 102, 105, 108, 109, 111, 114, 115, 117, 120, 123, 126, 127, 129, 132, 133, 135, 138, 141, 144, 145 (list; graph; listen)
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Last modified December 8 08:31 EST 2009. Contains 170430 sequences.


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