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%I #5 Mar 30 2012 18:56:45
%S 22,71,120,160,169,218,267,316,365,414,463,503,512,561,610,659,708,
%T 757,806,846,855,904,953,1002,1051,1126,1149,1189,1198,1247,1296,1345,
%U 1394,1443,1492,1532,1541,1590,1639,1688,1737,1786
%N Numbers n such that string 3,1 occurs in the base 7 representation of n but not of n+1.
%K nonn,base
%O 1,1
%A _Clark Kimberling_