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%I #17 Nov 25 2019 03:29:29
%S 4,124,11476,59356,80476,91636,250876,261964,482516,1385836,1926676,
%T 2428084,2589796,3743476,4101796,6797764,9155476,10701076,10743436,
%U 11263396,13799836,13859956,15570556,20396476
%N Pseudoprimes to base 5 that are not squarefree.
%C Any term is divisible by the square of a base 5 Wieferich prime (A123692).
%C Intersection of A005936 and A013929. - _Michel Marcus_, Aug 21 2014
%H Amiram Eldar, <a href="/A243010/b243010.txt">Table of n, a(n) for n = 1..879</a> (terms below 10^12)
%o (PARI) forcomposite(n=1, 1e9, if(Mod(5, n)^(n-1)==1, if(!issquarefree(n), print1(n, ", "))))
%Y Cf. A005936, A123692, A158358, A243089, A243090, A244065.
%K nonn
%O 1,1
%A _Felix Fröhlich_, Aug 18 2014
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