%I A044073
%S A044073 12,28,44,48,60,76,92,108,112,124,140,156,172,176,188,192,220,
%T A044073 236,240,252,268,284,300,304,316,332,348,364,368,380,396,412,
%U A044073 428,432,444,448,476,492,496,508,524,540,556,560,572,588,604
%N A044073 Numbers n such that string 3,0 occurs in the base 4 representation of 
               n but not of n-1.
%Y A044073 Sequence in context: A141274 A134618 A108405 this_sequence A044454 A098502 
               A158953
%Y A044073 Adjacent sequences: A044070 A044071 A044072 this_sequence A044074 A044075 
               A044076
%K A044073 nonn,base
%O A044073 1,1
%A A044073 Clark Kimberling (ck6(AT)evansville.edu)