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Primes whose reversal is a semiprime.
6

%I #8 Dec 15 2017 17:36:29

%S 19,41,43,47,53,59,83,103,109,127,137,163,173,193,197,229,241,263,283,

%T 307,317,331,349,367,379,397,419,431,433,439,479,491,503,509,541,547,

%U 557,563,569,587,593,599,601,607,641,643,647,661,683,719,773,811,853

%N Primes whose reversal is a semiprime.

%H Harvey P. Dale, <a href="/A085778/b085778.txt">Table of n, a(n) for n = 1..1000</a>

%t Select[Prime[Range[200]],PrimeOmega[FromDigits[Reverse[ IntegerDigits[ #]]]] ==2&] (* _Harvey P. Dale_, Apr 24 2014 *)

%Y Cf. A001358.

%K base,easy,nonn

%O 1,1

%A _Jason Earls_, Jul 23 2003