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A043037 n-th base 10 palindrome that starts with 2. 6
2, 22, 202, 212, 222, 232, 242, 252, 262, 272, 282, 292, 2002, 2112, 2222, 2332, 2442, 2552, 2662, 2772, 2882, 2992, 20002, 20102, 20202, 20302, 20402, 20502, 20602, 20702, 20802, 20902, 21012, 21112, 21212, 21312, 21412, 21512, 21612, 21712, 21812, 21912 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

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]] == 2 && palQ[#, 10] &] (* T. D. Noe, Mar 12 2013 *)

PROG

(PARI) isok(n) = (d=digits(n)) && (d[1]==2) && (Vecrev(d)==d); \\ Michel Marcus, Aug 22 2015

CROSSREFS

Sequence in context: A000184 A007613 A279801 * A058441 A255043 A239688

Adjacent sequences:  A043034 A043035 A043036 * A043038 A043039 A043040

KEYWORD

nonn,base

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified June 29 12:13 EDT 2017. Contains 288860 sequences.