%I #11 Aug 04 2015 13:19:22
%S 9,15,45,1065,1387,2651,3015,4005,4141,4187,5963,13747,35681,37901,
%T 38503,42813,52417,57541,58931,68773,85849,96709,106159,116003,118693,
%U 125563,131401,142717,153217,155629,158237,176149,204263,230323,239149,252601
%N Strong pseudoprimes to base 91.
%H R. J. Mathar, <a href="/A020317/b020317.txt">Table of n, a(n) for n = 1..209</a>
%H <a href="/index/Ps#pseudoprimes">Index entries for sequences related to pseudoprimes</a>
%K nonn
%O 1,1
%A _David W. Wilson_