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A127887
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Indices of nonzero terms of A127886.
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2
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9, 18, 27, 28, 31, 33, 36, 37, 39, 41, 43, 47, 49, 50, 54, 55, 56, 57, 59, 62, 63
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| These are the numbers for which allowing the choice of x/2 or 3x+1 in the "3x+1" iteration makes a difference in the minimal number of steps to reach 1.
Thus these are the n for which A006577(n) > A127885(n)
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CROSSREFS
| Sequence in context: A121282 A205716 A110529 * A037337 A119310 A037993
Adjacent sequences: A127884 A127885 A127886 * A127888 A127889 A127890
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KEYWORD
| nonn
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AUTHOR
| David Applegate (david(AT)research.att.com) and N. J. A. Sloane (njas(AT)research.att.com), Feb 04 2007
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