%I #11 Aug 06 2015 07:51:48
%S 49,51,561,793,817,2041,2501,2701,8041,9073,9577,12801,15457,17857,
%T 19951,22793,24727,29341,30857,39793,40321,57889,61337,79081,80137,
%U 93961,97921,107537,113257,124501,124999,132193,147109,153401,165413,178709,181351
%N Strong pseudoprimes to base 50.
%H R. J. Mathar, <a href="/A020276/b020276.txt">Table of n, a(n) for n = 1..300</a>
%H <a href="/index/Ps#pseudoprimes">Index entries for sequences related to pseudoprimes</a>
%K nonn
%O 1,1
%A _David W. Wilson_