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Search: id:A055239
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| A055239 |
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Numbers which not divisible by any of their digits in at least one base. |
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+0
7
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| 11, 13, 17, 19, 21, 22, 23, 25, 26, 27, 29, 31, 32, 33, 34, 35, 37, 38, 39, 40, 41, 43, 44, 45, 46, 47, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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It seems likely all integers greater than 120 appear in this sequence
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EXAMPLE
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9 is excluded because it can be written as 111111111, 1001, 100, 21, 14, 13, 12, 11, 10 or 9 and in every case there is a digit which divides 9; 11 is in the sequence because in base 4 it is written 23 and 11 is not divisible by either 2 or 3
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CROSSREFS
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Cf. A038772, A055238-A055242.
Sequence in context: A068569 A124176 A031979 this_sequence A138708 A061116 A048388
Adjacent sequences: A055236 A055237 A055238 this_sequence A055240 A055241 A055242
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KEYWORD
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base,easy,nonn
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AUTHOR
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Henry Bottomley (se16(AT)btinternet.com), May 04 2000
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