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%I #13 Aug 22 2021 14:56:03
%S 1,2,5,6,7,8,17,22,27,32,65,69,73,77,82,86,90,94,99,103,107,111,116,
%T 120,124,128,257,277,297,317,322,342,362,382,387,407,427,447,452,472,
%U 492,512,1025,1041,1057,1073,1093,1109,1125,1141
%N a(n) = (s(n)+3)/4, where s(n) is the n-th base-4 palindrome that starts with 1 (A043003).
%Y Cf. A007090, A043003.
%K nonn,base
%O 1,2
%A _Clark Kimberling_
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