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A031142
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Position of rightmost 0 (including leading 0) in 2^n increases.
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16
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0, 4, 7, 13, 14, 18, 24, 27, 31, 34, 37, 49, 51, 67, 72, 76, 77, 81, 86, 129, 176, 229, 700, 1757, 1958, 7931, 57356, 269518, 411658, 675531, 749254, 4400728, 18894561, 33250486, 58903708, 297751737, 325226398, 781717865, 18504580518, 27893737353
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OFFSET
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1,2
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COMMENTS
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"Positions" are counted 0,1,2,3,... starting with the least significant digit.
86 is the last n for which the rightmost zero is the leading zero.
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LINKS
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MATHEMATICA
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best = 0;
Select[Range[0, 10000],
If[(t = First@
First@StringPosition[StringReverse@("0" <> ToString@(2^#)),
"0"]) > best, best = t; True] &] (* Robert Price, Oct 11 2019 *)
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CROSSREFS
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KEYWORD
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nonn,base
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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