A043040 Numbers that are palindromic and divisible by 5.

5, 55, 505, 515, 525, 535, 545, 555, 565, 575, 585, 595, 5005, 5115, 5225, 5335, 5445, 5555, 5665, 5775, 5885, 5995, 50005, 50105, 50205, 50305, 50405, 50505, 50605, 50705, 50805, 50905, 51015, 51115, 51215, 51315, 51415, 51515, 51615, 51715, 51815, 51915

Offset

1,1

Comments

Or, numbers that are palindromic and begin with 5.

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]] == 5 && palQ[#, 10] &] (* T. D. Noe, Mar 12 2013 *)
Select[5*Range[11000], IntegerDigits[#]==Reverse[IntegerDigits[#]]&] (* Harvey P. Dale, Nov 29 2015 *)

Crossrefs

Sequence in context: A144894 A247775 A045640 * A342420 A226561 A062183

Adjacent sequences: A043037 A043038 A043039 * A043041 A043042 A043043

Keyword

nonn,base

Author

Clark Kimberling

Status

approved