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A205237 Numbers k such that, for the least prime p > 3, 2^n + p*2^k - 1 is prime with n/3 < k < n+1 and k the least if more than one solution. 4

%I

%S 1,1,3,2,3,3,3,3,7,4,5,5,7,6,9,6,7,7,13,7,9,13,17,14,19,12,11,10,21,

%T 13,15,20,15,15,15,14,15,26,21,19,15,18,21,18,31,19,22,23,27,31,27,34,

%U 21,26,21,32,27,39,25,22,32,27,25,46,43,29,61,23,29,25

%N Numbers k such that, for the least prime p > 3, 2^n + p*2^k - 1 is prime with n/3 < k < n+1 and k the least if more than one solution.

%H Pierre CAMI, <a href="/A205237/b205237.txt">Table of n, a(n) for n = 1..10800</a>

%o See A205236.

%Y Cf. A205236.

%K nonn

%O 1,3

%A _Pierre CAMI_, Jan 24 2012

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Last modified October 22 18:45 EDT 2021. Contains 348175 sequences. (Running on oeis4.)