A029950 Odd palindromes.

1, 3, 5, 7, 9, 11, 33, 55, 77, 99, 101, 111, 121, 131, 141, 151, 161, 171, 181, 191, 303, 313, 323, 333, 343, 353, 363, 373, 383, 393, 505, 515, 525, 535, 545, 555, 565, 575, 585, 595, 707, 717, 727, 737, 747, 757, 767, 777, 787, 797, 909, 919, 929, 939, 949

Offset

1,2

Comments

There are more odd palindromes (A328332) less than 10^K than even palindromes (A328333) because odd palindromes begin with 1, 3, 5, 7 or 9 while even palindromes begin only with 2, 4, 6 or 8. - Bernard Schott, Oct 24 2019

Links

Philip Mizzi, Table of n, a(n) for n = 1..7110 (terms up to 20000000).

P. De Geest, World!Of Numbers

Index entries for sequences related to palindromes

Mathematica

palindromicQ[n_, b_:10]:=TrueQ[IntegerDigits[n, b]==Reverse[IntegerDigits[n, b]]]; Select[Range[1, 10^4, 2], palindromicQ[#]&&Plus@@Drop[DigitCount[#], {1, 10, 1}]==0&] (* Vincenzo Librandi, Feb 07 2014 *)
Select[Range[1, 949, 2], PalindromeQ] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Jul 15 2017 *)

Prog

(PARI) lista(nn) = {forstep(n=1, nn, 2, if (is_A002113(n), print1(n, ", "))); } \\ Michel Marcus, Feb 06 2014

Crossrefs

Subsequence of A002113.

Cf. A029951 (even palindromes), A328332, A328333.

Sequence in context: A238795 A265079 A092361 * A061507 A046497 A061512

Adjacent sequences: A029947 A029948 A029949 * A029951 A029952 A029953

Keyword

nonn,base

Author

Patrick De Geest

Extensions

Offset set to 1 and more terms from Michel Marcus, Feb 06 2014

Status

approved