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%I #5 Mar 30 2012 18:56:42
%S 31,80,129,178,217,227,276,325,374,423,472,521,560,570,619,668,717,
%T 766,815,864,903,913,962,1011,1060,1109,1158,1207,1246,1256,1305,1354,
%U 1403,1452,1501,1519,1589,1599,1648,1697,1746,1795
%N Numbers n such that string 4,3 occurs in the base 7 representation of n but not of n-1.
%K nonn,base
%O 1,1
%A _Clark Kimberling_
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