%I #5 Mar 30 2012 18:38:52
%S 1,2,4,5,7,8,10,11,13,16,20,25,32,37,40,49,50,55,64,80,82,91,100,125,
%T 128,133,148,160,175,200,217,250,259,275,301,320,325,370,385,400,427,
%U 469,475,481,500,511,542,553,592,625,637,640,679,715,721,763,800,889
%N Let rep(n) be the n-th repunit number, sequence gives values of n such that rep(n)==rep(7) (mod n).
%Y Cf. A002275.
%K easy,nonn
%O 1,2
%A _Benoit Cloitre_, Mar 05 2002