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%I #17 Oct 14 2016 17:20:28
%S 1,5,77,278377,3697489,219596687717,56865169816619
%N Positive integers n such that n | (3^n + 2).
%C No other terms below 10^15. Some larger term: 3142423971953435020522506484187. - _Max Alekseyev_, Aug 04 2011
%Y Cf. A015940, A050259, A123062
%Y Solutions to 3^n == k (mod n): A277340 (k=-11), A277289 (k=-7), A277288 (k=-5), this sequence (k=-2), A015949 (k=-1), A067945 (k=1), A276671 (k=2), A276740 (k=5), A277126 (k=7), A277274 (k=11).
%K nonn,more
%O 1,2
%A _Robert G. Wilson v_
%E a(1)=1 prepended and a(6)-a(7) added by _Max Alekseyev_, Aug 04 2011
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