%I #5 Mar 30 2012 18:56:45

%S 31,67,103,139,175,191,211,247,283,319,355,391,407,427,463,499,535,

%T 571,607,623,643,679,715,751,787,823,839,859,895,931,967,1003,1039,

%U 1055,1075,1111,1151,1183,1219,1255,1271,1291,1327

%N Numbers n such that string 5,1 occurs in the base 6 representation of n but not of n+1.

%K nonn,base

%O 1,1

%A _Clark Kimberling_