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Numbers k such that 0 and 1 occur juxtaposed in the base-4 representation of k but not of k-1.
0

%I #13 Aug 22 2021 16:14:31

%S 4,16,33,36,49,52,64,97,100,113,116,129,132,144,161,164,177,180,193,

%T 196,208,225,228,241,244,256,353,356,369,372,385,388,400,417,420,433,

%U 436,449,452,464,481,484,497,500,513,516,528,545

%N Numbers k such that 0 and 1 occur juxtaposed in the base-4 representation of k but not of k-1.

%Y Cf. A007090.

%K nonn,base

%O 1,1

%A _Clark Kimberling_