%I A037504
%S A037504 1,5,15,46,140,420,1261,3785,11355,34066,102200,306600,919801,
%T A037504 2759405,8278215,24834646,74503940,223511820,670535461,2011606385,
%U A037504 6034819155,18104457466,54313372400,162940117200,488820351601
%N A037504 Base-3 digits are, in order, the first n terms of the periodic sequence 
               with initial period 1,2,0.
%Y A037504 Sequence in context: A001869 A058425 A079798 this_sequence A105465 A089040 
               A126944
%Y A037504 Adjacent sequences: A037501 A037502 A037503 this_sequence A037505 A037506 
               A037507
%K A037504 nonn,base
%O A037504 1,2
%A A037504 Clark Kimberling (ck6(AT)evansville.edu)