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

1, 3, 17, 18, 19, 20, 21, 22, 23, 24, 129, 138, 147, 156, 165, 174, 183, 192, 1025, 1033, 1041, 1049, 1057, 1065, 1073, 1081, 1090, 1098, 1106, 1114, 1122, 1130, 1138, 1146, 1155, 1163, 1171, 1179, 1187, 1195, 1203, 1211

Offset: 1

Author

Clark Kimberling

Keywords

• nonn
• base

Crossrefs

Cf. A043022.

Programs

Mathematica

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 *)

Formula

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