cp's OEIS Frontend

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.

%I A069176 #15 Nov 02 2023 06:14:41
%S A069176 253680,1138830,58680930,90895770,124253010,269877300,392071680,
%T A069176 613813200,1014342210,1277981670,1413015030,1453978680,1753585680,
%U A069176 2919331380,3424037190,3538972710,4025789040,4175762010,4362439200
%N 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.
%C A069176 For one such number, 41887255410, even 16n-1 and 16n+1 are primes.
%e A069176 253680 is there because 253679, 253681, 507359, 507361, 1014719, 1014721, 2029439 and 2029441 are all prime.
%Y A069176 Cf. A118860. Subset of A069175.
%K A069176 nonn
%O A069176 1,1
%A A069176 _Don Reble_, Apr 09 2002