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Search: id:A063156
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| A063156 |
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Composite numbers which in base 6 contain their largest proper factor as a substring. |
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+0
2
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| 9, 403, 8383, 9287, 14299, 15403, 16459, 17543, 19291, 20989, 25807, 26743, 30301, 68191, 96307, 111277, 120059, 121903, 158299, 166391, 195583, 221443, 238603, 248551, 292499, 317131, 356879, 403927, 421901, 422419, 440599, 443119, 457297
(list; graph; listen)
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OFFSET
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1,1
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MATHEMATICA
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Do[ If[ !PrimeQ[ n ] && StringPosition[ ToString[ FromDigits[ IntegerDigits[ n, 6 ] ] ], ToString[ FromDigits[ IntegerDigits[ Divisors[ n ] [ [ -2 ] ], 6 ] ] ] ] != {}, Print[ n ] ], {n, 2, 10^6} ]
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CROSSREFS
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Cf. A062238.
Sequence in context: A012078 A157599 A063876 this_sequence A058850 A151632 A035024
Adjacent sequences: A063153 A063154 A063155 this_sequence A063157 A063158 A063159
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KEYWORD
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base,nonn
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AUTHOR
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Robert G. Wilson v (rgwv(AT)rgwv.com), Aug 08 2001
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