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A178680
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Numbers n such that the binary expansion of n contains the base 3 expansion of n as a substring.
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2
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0, 1, 9, 10, 12, 94, 118, 120, 1002, 1003, 2217, 22204, 22602, 26608, 27004, 27009, 531795, 774202, 776424, 776467, 1604056, 1616464, 1660780, 1673176, 1673299, 5021473, 5039860, 5039902, 5039904, 5042124, 5321298, 6384861, 16495194, 16495195
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,3
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LINKS
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EXAMPLE
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774202 = 10111101000000111010 (base 2)
774202 = ...1110100000011.... (base 3)
1604056 = 110000111100111011000 (base 2)
1604056 = .10000111100111...... (base 3)
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MATHEMATICA
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Do[i3=IntegerString[n, 2]; l3=StringLength[i3]; i=FromDigits[i3, 3]; i2=IntegerString[i, 2]; If[StringPosition[i2, i3]!={}, Print[i]]; , {n, 0, 10^7}]; (* Ray Chandler*)
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CROSSREFS
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KEYWORD
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base,nonn
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AUTHOR
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STATUS
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approved
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