A159471 Palindromic primes using only odd digits (1, 3, 5, 7 or 9).

3, 5, 7, 11, 131, 151, 191, 313, 353, 373, 757, 797, 919, 11311, 13331, 13931, 15551, 17971, 19391, 19991, 31513, 33533, 35153, 35353, 35753, 37573, 71317, 71917, 75557, 77377, 77977, 79397, 79997, 93139, 93739, 95959, 97379, 97579, 1117111

Offset: 1

Author

Juri-Stepan Gerasimov, Apr 13 2009

Keywords

• nonn
• base
• less

Links

• Harvey P. Dale, Table of n, a(n) for n = 1..1000

Crossrefs

Cf. A002385, A083185.

Programs

Mathematica

Table[Select[FromDigits/@Tuples[{1,3,5,7,9},n],PrimeQ[#]&& # == IntegerReverse[ #]&],{n,7}]//Flatten (* Harvey P. Dale, Sep 17 2016 *)

Extensions

Entries checked by R. J. Mathar, May 21 2010