%I A046808
%S A046808 1,2,3,5,7,14,19,46,48,62,67,74,81,89,589,2090,2299,7742
%N A046808 Recursive sequence of indices of Proth primes a*2^b + 1.
%C A046808 Searched up to 7742*2^100000 + 1 (3871*2^100001 + 1 is the format in 
               the Yves Gallot's Proth Program)
%H A046808 Y. Gallot, <a href="http://www.utm.edu/research/primes/programs/gallot/
               index.html">Proth.exe: Windows Program for Finding Large Primes</
               a>
%F A046808 a(n) = least integer b greater than a(n-1) such that a(n-1)*2^b + 1 is 
               prime
%Y A046808 Sequence in context: A007311 A031345 A114625 this_sequence A097799 A005629 
               A028304
%Y A046808 Adjacent sequences: A046805 A046806 A046807 this_sequence A046809 A046810 
               A046811
%K A046808 hard,nonn
%O A046808 0,2
%A A046808 Chad Davis (cad16(AT)po.cwru.edu)