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Primes whose base 9 reversal is also prime.
7

%I #5 May 23 2021 02:50:46

%S 2,3,5,7,11,13,17,19,23,37,43,47,67,71,73,79,83,97,101,109,113,127,

%T 139,151,157,163,173,179,181,191,193,197,227,229,239,241,331,337,353,

%U 367,373,379,383,389,397,419,433,439,457,463,479,571,577,593,599,601,607

%N Primes whose base 9 reversal is also prime.

%H Amiram Eldar, <a href="/A075239/b075239.txt">Table of n, a(n) for n = 1..10000</a>

%t Prime[ Select[ Range[115], PrimeQ[ FromDigits[ Reverse[ IntegerDigits[ Prime[ # ], 9]], 9]] &]]

%Y Cf. A007500, A074832, A074833, A074834, A075235, A075236, A075237, A075238.

%K base,easy,nonn

%O 1,1

%A _Robert G. Wilson v_, Sep 09 2002