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A090834 Primes p such that p, p+6, p+12, p+18 are consecutive primes and p=6*k+5 for some k. 9

%I #6 Dec 12 2015 12:55:00

%S 251,5381,6311,12641,13451,14741,15791,17471,23321,26171,56081,62201,

%T 75521,78791,82781,84431,89381,94421,95261,104711,115751,120551,

%U 121001,154061,162251,163841,179801,185051,187361,191021,206021,214451,222311,226631,243521

%N Primes p such that p, p+6, p+12, p+18 are consecutive primes and p=6*k+5 for some k.

%H Harvey P. Dale, <a href="/A090834/b090834.txt">Table of n, a(n) for n = 1..1000</a>

%e 251,257,263,269 are consecutive primes,257=251+6,263=251+12,269=251+18 and 251=6*41+5

%t Transpose[Select[Partition[Prime[Range[30000]],4,1],Differences[#]=={6,6,6}&&IntegerQ[(#[[1]]-5)/6]&]][[1]] (* _Harvey P. Dale_, Dec 12 2015 *)

%Y Cf. A033451, A090832, A090833, A090835, A090836, A090837, A090838, A090839.

%K easy,nonn

%O 1,1

%A _Pierre CAMI_, Dec 09 2003

%E More terms from _Harvey P. Dale_, Dec 12 2015

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Last modified March 28 18:04 EDT 2024. Contains 371254 sequences. (Running on oeis4.)