A043106 - OEIS

%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_