%I A032490
%S A032490 11,15,35,51,83,87,99,183,4619,4659,6939,7503,10647,13007,18459,19599,
%T A032490 26363,43719,53171
%N A032490 Numbers n such that 227*2^n+1 is prime.
%H A032490 Ray Ballinger and Wilfrid Keller, <a href="http://www.prothsearch.net/
               riesel.html">List of primes k.2^n + 1 for k < 300</a>
%H A032490 Wilfrid Keller, <a href="http://www.prothsearch.net/riesel2.html">List 
               of primes k.2^n - 1 for k < 300</a>
%H A032490 <a href="Sindx_Pri.html#riesel">Index entries for sequences of n such 
               that k*2^n-1 (or k*2^n+1) is prime</a>
%H A032490 Ray Ballinger, <a href="http://www.prothsearch.net/index.html">Proth 
               Search Page</a>
%Y A032490 Sequence in context: A030099 A085597 A097512 this_sequence A068483 A115779 
               A147339
%Y A032490 Adjacent sequences: A032487 A032488 A032489 this_sequence A032491 A032492 
               A032493
%K A032490 nonn,hard
%O A032490 1,1
%A A032490 N. J. A. Sloane (njas(AT)research.att.com).