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A043044 Palindromes that start with 9. 3
9, 99, 909, 919, 929, 939, 949, 959, 969, 979, 989, 999, 9009, 9119, 9229, 9339, 9449, 9559, 9669, 9779, 9889, 9999, 90009, 90109, 90209, 90309, 90409, 90509, 90609, 90709, 90809, 90909, 91019, 91119, 91219, 91319, 91419, 91519, 91619, 91719, 91819, 91919 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Subsequence of A002113 (palindromic numbers). Union of A128375 (palindromic primes starting with a digit 9) and A222729 (palindromic composite numbers starting with a digit 9). - Jaroslav Krizek, Mar 12 2013

LINKS

Jaroslav Krizek, Table of n, a(n) for n = 1..2222

MATHEMATICA

palQ[n_Integer, base_Integer] := Module[{idn = IntegerDigits[n, base]}, idn == Reverse[idn]]; Select[Range[0, 100000], IntegerDigits[#][[1]] == 9 && palQ[#, 10] &] (* T. D. Noe, Mar 12 2013 *)

CROSSREFS

Sequence in context: A116286 A160946 A100681 * A222729 A069000 A250603

Adjacent sequences:  A043041 A043042 A043043 * A043045 A043046 A043047

KEYWORD

nonn,base

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified March 26 23:14 EDT 2017. Contains 284138 sequences.