%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_