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%I #4 Mar 31 2012 13:20:40
%S 2,5,13,61681,1235573,27544452149
%N Primes p such that p^2 divides A085606(2p-2) = (2p-3)^(2p-2) - 1.
%C For p>3, (2p-3)^(2p-2) - 1 is divisible by p.
%C Primes p such that 3^p == 3-2p (mod p^2).
%C No other terms below 10^11.
%Y Cf. A085606.
%K hard,more,nonn
%O 1,1
%A _Alexander Adamchuk_, Jan 28 2009
%E 27544452149 from _Max Alekseyev_, Oct 14 2009