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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

%I

%S 253680,1138830,58680930,90895770,124253010,269877300,392071680,

%T 613813200,1014342210,1277981670,1413015030,1453978680,1753585680,

%U 2919331380,3424037190,3538972710,4025789040,4175762010,4362439200

%N Numbers n such that n-1, n+1, 2n-1, 2n+1, 4n-1, 4n+1, 8n-1 and 8n+1 are all prime.

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

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

%Y Cf. A118860.

%K nonn

%O 1,1

%A _Don Reble_, Apr 09 2002

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Last modified August 10 14:50 EDT 2020. Contains 336381 sequences. (Running on oeis4.)