A128375 Palindromic primes that start and end with 9.

919, 929, 90709, 91019, 93139, 93239, 93739, 94049, 94349, 94649, 94849, 94949, 95959, 96269, 96469, 96769, 97379, 97579, 97879, 98389, 98689, 9002009, 9015109, 9024209, 9037309, 9042409, 9043409, 9045409, 9046409, 9049409, 9067609, 9073709, 9076709, 9078709

Offset: 1

Author

Lekraj Beedassy, Feb 27 2007

Keywords

• nonn
• base
• less
• changed

Comments

Subsequence of A002385 (palindromic primes) and A002113 (palindromic numbers). Complement of A222729 (palindromic composite numbers starting with a digit 9) with respect to A043044 (palindromic numbers starting with a digit 9). - Jaroslav Krizek, Mar 09 2013

Links

• Jaroslav Krizek, Table of n, a(n) for n = 1..1000

Crossrefs

Cf. A002385, A128374, A128376.

Programs

Mathematica

Select[Prime[Range[607000]], Reverse[x = IntegerDigits[#]] == x && First[x] == 9 &] (* Jayanta Basu, Jun 24 2013 *)

Extensions

Extended by Ray Chandler, Feb 28 2007