This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A043066 #16 Sep 20 2023 18:49:51
%S A043066 1,3,17,18,19,20,21,22,23,24,129,138,147,156,165,174,183,192,1025,
%T A043066 1033,1041,1049,1057,1065,1073,1081,1090,1098,1106,1114,1122,1130,
%U A043066 1138,1146,1155,1163,1171,1179,1187,1195,1203,1211
%N A043066 a(n) = (s(n)+6)/8, where s(n) = n-th base 8 palindrome that starts with 2.
%F A043066 a(n) = (A043022(n) + 6)/8.
%t A043066 b8pQ[n_]:=With[{idn=IntegerDigits[n,8]},idn==Reverse[idn]&&idn[[1]]==2]; (#+6)/8&/@ Select[ Range[1000],b8pQ] (* _Harvey P. Dale_, Sep 20 2023 *)
%Y A043066 Cf. A043022.
%K A043066 nonn,base
%O A043066 1,2
%A A043066 _Clark Kimberling_