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A043080
a(n)=(s(n)+9)/10, where s(n)=n-th base 10 palindrome that starts with 1.
0
1, 2, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 101, 112, 123, 134, 145, 156, 167, 178, 189, 200, 1001, 1011, 1021, 1031, 1041, 1051, 1061, 1071, 1081, 1091, 1102, 1112, 1122, 1132, 1142, 1152, 1162, 1172, 1182, 1192, 1203, 1213
OFFSET
1,2
MATHEMATICA
(#+9)/10&/@Select[Range[100000], PalindromeQ[#]&&IntegerDigits[#][[1]]==1&] (* Harvey P. Dale, Jul 20 2024 *)
CROSSREFS
Sequence in context: A359207 A068225 A367810 * A108199 A137904 A175414
KEYWORD
nonn,base
STATUS
approved