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A053312
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a(n) contains n digits (either '1' or '2') and is divisible by 2^n.
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2
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2, 12, 112, 2112, 22112, 122112, 2122112, 12122112, 212122112, 1212122112, 11212122112, 111212122112, 1111212122112, 11111212122112, 211111212122112, 1211111212122112, 11211111212122112, 111211111212122112
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