%I A053353
%S A053353 1,2,5,10,13,40,41,45,56,64,72,86,94,121,160,213,338,352,833,1014,1072,
%T A053353 1098,1297,1381,1952,1990,2421,2600,3474,3533,3602,4361,5846,6234,6926,
%U A053353 7562,8238,10866,11240,11765,26408,26648,28258,53233,53405,67344,73453
%N A053353 Numbers n such that 273*2^n+1 is prime.
%H A053353 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 A053353 Wilfrid Keller, <a href="http://www.prothsearch.net/riesel2.html">List 
               of primes k.2^n - 1 for k < 300</a>
%H A053353 <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>
%Y A053353 Sequence in context: A033316 A099194 A140411 this_sequence A099792 A115757 
               A159032
%Y A053353 Adjacent sequences: A053350 A053351 A053352 this_sequence A053354 A053355 
               A053356
%K A053353 hard,nonn
%O A053353 1,2
%A A053353 N. J. A. Sloane (njas(AT)research.att.com), Dec 29 1999