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%I #11 Aug 25 2021 04:55:12
%S 11,31,47,71,83,103,119,139,155,175,191,211,227,247,263,287,299,319,
%T 335,355,371,391,431,443,463,479,503,515,535,551,571,587,607,623,643,
%U 659,679,695,719,731,751,767,787,803,823,839,859
%N Numbers k such that 1 and 5 occur juxtaposed in the base-6 representation of k but not of k+1.
%Y Cf. A007092.
%K nonn,base
%O 1,1
%A _Clark Kimberling_