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%I #8 Aug 22 2021 16:13:20
%S 5,25,51,55,76,80,101,105,125,176,180,201,205,226,230,251,255,275,301,
%T 305,326,330,351,355,376,380,400,426,430,451,455,476,480,501,505,525,
%U 551,555,576,580,601,605,625,801,805,826,830
%N Numbers k such that 0 and 1 occur juxtaposed in the base-5 representation of k but not of k-1.
%Y Cf. A007091.
%K nonn,base
%O 1,1
%A _Clark Kimberling_