A237438 - OEIS

%I #15 Feb 08 2014 15:06:45

%S 2,3,5,7,11,43,47,53,59,61,89,97,101,139,151,167,199,241,251,257,269,

%T 281,337,373,443,557,599,607,647,653,829,971,1051,1093,1163,1223,1279,

%U 1327,1433,1459,1499,1549,1583,1597,1607

%N Double Hex-primes: let f(n) = A102489(n); then sequence lists primes p such that f(p) and f(f(p)) are also primes.

%C This sequence is a subset of A103144.

%H Andreas Boe, <a href="/A237438/b237438.txt">Table of n, a(n) for n = 1..6084</a>

%e Dec61=prime -> Hex61=Dec97=prime -> Hex97=Dec151=prime.

%Y Cf. A102489.

%Y Cf. A103144 (Hex-primes), A237439 (Triple Hex-primes), A237440 (Quadruple Hex-primes), A237441 (Quintuple Hex-primes).

%K nonn,base

%O 1,1

%A _Andreas Boe_, Feb 07 2014