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%I #3 Feb 27 2009 03:00:00
%S 13,17,37,79,113,131,149,157,163,167,179,181,191,197,199,241,251,281,
%T 313,337,347,359,373,389,419,461,463,491,563,571,593,613,617,683,719,
%U 787,797,839,919,1163,1181,1193,1217,1223,1229,1237,1249,1259,1279,1297
%N Nontrivial numbers which are prime and yield another prime when their digits are sorted in descending order.
%C Primes with digits already in descending order (like 311 and 3221) are trivial cases and are therefore excluded.
%e a(1)=13 because a descending sort of 13's digits yields 31 which is also prime. a(100)=2411 because a descending sort of 2411's digits yields 4211 which is also prime.
%Y Cf. A003459.
%K base,nonn
%O 1,1
%A Chuck Seggelin (barkeep(AT)plastereddragon.com), Jul 07 2003
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