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A069176 Numbers n such that n-1, n+1, 2n-1, 2n+1, 4n-1, 4n+1, 8n-1 and 8n+1 are all prime. 0
253680, 1138830, 58680930, 90895770, 124253010, 269877300, 392071680, 613813200, 1014342210, 1277981670, 1413015030, 1453978680, 1753585680, 2919331380, 3424037190, 3538972710, 4025789040, 4175762010, 4362439200 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

For one such number, 41887255410, even 16n-1 and 16n+1 are primes.

LINKS

Table of n, a(n) for n=1..19.

EXAMPLE

253680 is there because 253679, 253681, 507359, 507361, 1014719, 1014721, 2029439 and 2029441 are all prime.

CROSSREFS

Cf. A118860.

Sequence in context: A236163 A140967 A236443 * A253725 A140079 A321505

Adjacent sequences:  A069173 A069174 A069175 * A069177 A069178 A069179

KEYWORD

nonn

AUTHOR

Don Reble, Apr 09 2002

STATUS

approved

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Last modified April 20 06:19 EDT 2019. Contains 322294 sequences. (Running on oeis4.)