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A129848
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Numbers n such that n and 4n share at least one digit.
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6
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10, 16, 20, 23, 28, 30, 31, 32, 33, 34, 40, 41, 46, 49, 50, 52, 60, 62, 64, 65, 66, 67, 69, 70, 72, 80, 82, 83, 87, 90, 93, 98, 99, 100, 101, 102, 103, 104, 105, 110, 114, 116, 120, 123, 124, 125, 128, 129, 130, 132, 133, 134, 135, 140, 141, 145, 146, 149, 150, 153
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graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,1
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LINKS
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MAPLE
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a:=proc(n) if nops(convert(convert(n, base, 10), set) intersect convert(convert(4*n, base, 10), set))>0 then n else fi end: seq(a(n), n=1..180); # Emeric Deutsch, May 27 2007
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MATHEMATICA
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Select[Range[300], Length[Intersection[IntegerDigits[ # ], IntegerDigits[4*# ]]]> 0 &] (* Stefan Steinerberger, May 24 2007 *)
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CROSSREFS
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KEYWORD
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base,easy,nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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