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Numbers n such that string 5,1 occurs in the base 9 representation of n but not of n+1.
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%I #5 Mar 30 2012 18:56:46

%S 46,127,208,289,370,422,451,532,613,694,775,856,937,1018,1099,1151,

%T 1180,1261,1342,1423,1504,1585,1666,1747,1828,1880,1909,1990,2071,

%U 2152,2233,2314,2395,2476,2557,2609,2638,2719,2800

%N Numbers n such that string 5,1 occurs in the base 9 representation of n but not of n+1.

%K nonn,base

%O 1,1

%A _Clark Kimberling_