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A006877 In the `3x+1' problem, these values for the starting value set new records for number of steps to reach 1.
(Formerly M0748)
+0
12
1, 2, 3, 6, 7, 9, 18, 25, 27, 54, 73, 97, 129, 171, 231, 313, 327, 649, 703, 871, 1161, 2223, 2463, 2919, 3711, 6171, 10971, 13255, 17647, 23529, 26623, 34239, 35655, 52527, 77031, 106239, 142587, 156159, 216367, 230631, 410011, 511935, 626331, 837799 (list; graph; listen)
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Last modified November 29 12:46 EST 2009. Contains 167659 sequences.


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