%I A090082
%S A090082 4,124,5662,11476,59356,80476,91636,250876,261964,482516,1385836,
%T A090082 1892458,1926676,2428084,2589796,3743476,4101796,6797764,9155476,
%U A090082 10701076,10743436,11263396,13799836,13859956,15570556,20396476
%N A090082 Even pseudoprimes to base 5.
%t A090082 Do[s=Mod[ -1+5^(n-1), n]; If[Equal[s, 0]&&!PrimeQ[n]&&EvenQ[n], Print[n]], 
               {n, 1, 1000000}]
%Y A090082 Cf. A005936.
%Y A090082 Sequence in context: A144993 A064681 A005936 this_sequence A068891 A073351 
               A068894
%Y A090082 Adjacent sequences: A090079 A090080 A090081 this_sequence A090083 A090084 
               A090085
%K A090082 nonn
%O A090082 1,1
%A A090082 Labos E. (labos(AT)ana.sote.hu), Nov 25 2003
%E A090082 More terms from Farideh Firoozbakht (mymontain(AT)yahoo.com), Sep 13 
               2006