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A043066 a(n) = (s(n)+6)/8, where s(n) = n-th base 8 palindrome that starts with 2. 1

%I #16 Sep 20 2023 18:49:51

%S 1,3,17,18,19,20,21,22,23,24,129,138,147,156,165,174,183,192,1025,

%T 1033,1041,1049,1057,1065,1073,1081,1090,1098,1106,1114,1122,1130,

%U 1138,1146,1155,1163,1171,1179,1187,1195,1203,1211

%N a(n) = (s(n)+6)/8, where s(n) = n-th base 8 palindrome that starts with 2.

%F a(n) = (A043022(n) + 6)/8.

%t 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 Cf. A043022.

%K nonn,base

%O 1,2

%A _Clark Kimberling_

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Last modified April 16 18:22 EDT 2024. Contains 371750 sequences. (Running on oeis4.)