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%I #5 Mar 30 2012 18:56:46
%S 52,133,214,295,376,457,476,538,619,700,781,862,943,1024,1105,1186,
%T 1205,1267,1348,1429,1510,1591,1672,1753,1834,1915,1934,1996,2077,
%U 2158,2239,2320,2401,2482,2563,2644,2663,2725,2806
%N Numbers n such that string 5,7 occurs in the base 9 representation of n but not of n+1.
%K nonn,base
%O 1,1
%A _Clark Kimberling_