%I A046809
%S A046809 1,2,4,5,8,10,11,26,286,365,602,630,713,808,1327,3561,3566,5286,5477,
%T A046809 10600,13485,15441,17339,76856
%N A046809 Recursive sequence of indices of Proth primes a*2^b - 1.
%C A046809 Searched up to 76856*2^100000 - 1 (9607*2^100003 - 1 is the format in 
               the Yves Gallot's Proth Program)
%H A046809 Y. Gallot, <a href="http://www.utm.edu/research/primes/programs/gallot/
               index.html">Proth.exe: Windows Program for Finding Large Primes</
               a>
%F A046809 a(n) = least integer greater than a(n-1) such that a(n-1)*2^a(n) - 1 
               is prime
%Y A046809 Sequence in context: A073628 A067938 A018457 this_sequence A112777 A047612 
               A123886
%Y A046809 Adjacent sequences: A046806 A046807 A046808 this_sequence A046810 A046811 
               A046812
%K A046809 hard,nonn
%O A046809 1,2
%A A046809 Chad Davis (cad16(AT)po.cwru.edu)