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A031143
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Position of rightmost 0 (including leading 0) in 2^A031142(n).
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5
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1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 15, 16, 21, 22, 23, 24, 25, 26, 36, 38, 54, 57, 59, 93, 115, 119, 120, 121, 136, 138, 164, 174, 176, 191, 196, 212, 217, 227, 233, 249, 250, 260, 268, 275, 308
(list;
graph;
refs;
listen;
history;
text;
internal format)
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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.
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LINKS
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Table of n, a(n) for n=1..46.
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MATHEMATICA
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best = 0; lst = {};
x = Select[Range[0, 10000],
If[(t = First@
First@StringPosition[StringReverse@("0" <> ToString@(2^#)),
"0"]) > best, best = t; AppendTo[lst, t - 1]; True] &] ; lst (* Robert Price, Oct 11 2019 *)
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CROSSREFS
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Cf. A031140, A031141, A031142, A031143.
Sequence in context: A156541 A325663 A277620 * A302594 A055492 A005459
Adjacent sequences: A031140 A031141 A031142 * A031144 A031145 A031146
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KEYWORD
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nonn
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AUTHOR
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Matthew Cook, Dan Hoey, Eric W. Weisstein, David W. Wilson
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EXTENSIONS
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More terms from Dan Hoey
a(42)-a(44) from Alan Griffiths, Jan 25 2012
a(45) from Alan Griffiths, Feb 01 2012
a(46) from Alan Griffiths, Mar 09 2012
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STATUS
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approved
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