

A033492


Record number of steps to reach 1 in '3x+1' problem, corresponding to starting values in A006877 (same as A006878 except here we start counting at 1 instead of 0).


9



1, 2, 8, 9, 17, 20, 21, 24, 112, 113, 116, 119, 122, 125, 128, 131, 144, 145, 171, 179, 182, 183, 209, 217, 238, 262, 268, 276, 279, 282, 308, 311, 324, 340, 351, 354, 375, 383, 386, 443, 449, 470, 509, 525, 528, 531, 557, 560, 563, 584, 597, 613, 665, 686
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OFFSET

1,2


COMMENTS

Both the 3x+1 steps and the halving steps are counted.


REFERENCES

R. E. Maeder, Programming in Mathematica, 3rd Edition, AddisonWesley, pages 251252.


LINKS



CROSSREFS



KEYWORD

nonn


AUTHOR



EXTENSIONS

Corrected and extended by Lee Corbin (lcorbin(AT)tsoft.com)
More terms from Larry Reeves (larryr(AT)acm.org), Apr 27 2001


STATUS

approved



