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A043036
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Base 10 palindromes that start with 1.
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3
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1, 11, 101, 111, 121, 131, 141, 151, 161, 171, 181, 191, 1001, 1111, 1221, 1331, 1441, 1551, 1661, 1771, 1881, 1991, 10001, 10101, 10201, 10301, 10401, 10501, 10601, 10701, 10801, 10901, 11011, 11111, 11211, 11311, 11411, 11511, 11611, 11711, 11811, 11911
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listen;
history;
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OFFSET
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1,2
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COMMENTS
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Union of A222723 (palindromic primes starting with a digit 1) and A222724 (palindromic nonprime numbers starting with a digit 1). - Jaroslav Krizek, Mar 03 2013
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LINKS
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MATHEMATICA
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palQ[n_Integer, base_Integer] := Module[{idn = IntegerDigits[n, base]}, idn == Reverse[idn]]; Select[Range[0, 20000], IntegerDigits[#][[1]] == 1 && palQ[#, 10] &] (* T. D. Noe, Mar 12 2013 *)
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CROSSREFS
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Cf. A002113 (palindromes in base 10).
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KEYWORD
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nonn,base
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AUTHOR
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STATUS
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approved
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