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%I #6 Dec 12 2016 09:18:22
%S 1,34,219760,75963904,1003204036
%N Numbers n such that 2^n == n (mod sigma(n)).
%e 34 is a term because 2^34 == 34 mod 54.
%o (PARI) is(n)=Mod(2, sigma(n))^n==n;
%Y Cf. A000079, A000203.
%K nonn,more
%O 1,2
%A _Altug Alkan_, Dec 11 2016
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