A075237 Primes whose base 7 reversal is also prime.

2, 3, 5, 11, 13, 17, 19, 23, 29, 37, 41, 43, 47, 53, 67, 71, 79, 89, 97, 101, 107, 127, 137, 139, 149, 151, 157, 167, 173, 179, 193, 197, 199, 211, 227, 229, 233, 241, 257, 269, 271, 277, 281, 307, 311, 331, 337, 347, 373, 389, 397, 401, 419, 421, 433, 439, 443

Offset: 1

Author

Robert G. Wilson v, Sep 09 2002

Keywords

• base
• easy
• nonn

Links

• Amiram Eldar, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A007500, A074832, A074833, A074834, A075235, A075236, A075238, A075239.

Programs

Mathematica

Prime[ Select[ Range[100], PrimeQ[ FromDigits[ Reverse[ IntegerDigits[ Prime[ # ], 7]], 7]] &]]