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%I #16 Oct 29 2013 14:49:22
%S 3,1,19,3,19,273,93,113,87,35,31,143,31,15,315,779,207,347,91,327,291,
%T 351,195,39,1911,971,1083,435,1345,593,183,1295,291,2553,735,1113,31,
%U 131,61,209,379,567,2331,1907,4429,23,453,1517,2281,2187,1441,4847,1975
%N Smallest odd k such that k*2^n-1, k*2^n-1+2*j, k*2^n-1+4*j or k*2^n-1-2*j, k*2^n-1, k*2^n-1+2*j are consecutive primes in arithmetic progression for some j.
%H Pierre CAMI, <a href="/A227888/b227888.txt">Table of n, a(n) for n = 1..325</a>
%e 3*2^1-1-2=3 3*2^1-1=5 3*2^1-1+2=7 so a(1)=3.
%e 3*2^4-1=47 3*2^4-1+6=53 3*2^4-1+12=59 so a(4)=3.
%Y Cf. A052187.
%K nonn
%O 1,1
%A _Pierre CAMI_, Oct 26 2013
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