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A217422
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Numbers of the form 2^r*17^s whose decimal representations are such that each digit 0-9 appears a prime number of times.
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13
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OFFSET
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1,1
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COMMENTS
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See formula section for more data. Others in cross-reference are similar and some hold more motivation in comments.
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LINKS
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FORMULA
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EXAMPLE
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A217423(1)=47 and A217424(1)=8, so this sequence's first term is 2^47 * 17^8. It has in its decimal representation two copies each of the digits 0, 2, 3, 4, 6 and 7; and three copies each of 1, 5, 8 and 9.
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CROSSREFS
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Cf. A217854, A217423, A217424, A217404, A217407, A217410, A217413, A217416, A217419, A217425, A217428, A217431.
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KEYWORD
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nonn,base,less
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AUTHOR
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STATUS
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approved
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