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%I #5 Mar 30 2012 18:56:42
%S 27,76,125,174,189,223,272,321,370,419,468,517,532,566,615,664,713,
%T 762,811,860,875,909,958,1007,1056,1105,1154,1203,1218,1252,1301,1323,
%U 1399,1448,1497,1546,1561,1595,1644,1693,1742,1791
%N Numbers n such that string 3,6 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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