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Search: id:A069176
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| A069176 |
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Numbers n such that n-1, n+1, 2n-1, 2n+1, 4n-1, 4n+1, 8n-1 and 8x+1 are all prime. |
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| 253680, 1138830, 58680930, 90895770, 124253010, 269877300, 392071680, 613813200, 1014342210, 1277981670, 1413015030, 1453978680, 1753585680, 2919331380, 3424037190, 3538972710, 4025789040, 4175762010, 4362439200
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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For one such number, 41887255410, even 16X-1 and 16X+1 are primes.
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EXAMPLE
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253680 is there because 253679, 253681, 507359, 507361, 1014719, 1014721, 2029439 and 2029441 are all prime.
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CROSSREFS
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Sequence in context: A113567 A083628 A140967 this_sequence A140079 A034631 A147579
Adjacent sequences: A069173 A069174 A069175 this_sequence A069177 A069178 A069179
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KEYWORD
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nonn
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AUTHOR
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Don Reble (djr(AT)nk.ca), Apr 09 2002
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