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A135495
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Numbers n with property that for each single digit d of n, we can also see the decimal expansion of 2d as a substring of n.
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2
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0, 121648, 121684, 124168, 124816, 128164, 128416, 161248, 161284, 164128, 164812, 168124, 168412, 412168, 412816, 416128, 416812, 481216, 481612, 812164, 812416, 816124, 816412, 841216, 841612, 1121648, 1121684, 1124168
(list; graph; refs; listen; history; internal format)
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