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%I #7 May 13 2013 01:54:09
%S 199,317,509,523,619,839,887,1069,1129,1259,1327,1409,1459,1499,1637,
%T 1669,1709,1759,1789,1847,1889,1913,1951,2039,2069,2099,2179,2311,
%U 2357,2399,2477,2503,2557,2579,2819,2939,2971,3049,3089,3137,3169,3229,3259
%N Numbers appearing in A122072 at least twice.
%C Necessary condition: p is followed by a prime gap of at least 12. Sufficient condition: p is followed by a prime gap of at least 20. [_Charles R Greathouse IV_, Feb 26 2012]
%H Charles R Greathouse IV, <a href="/A122091/b122091.txt">Table of n, a(n) for n = 1..10000</a>
%F a(n) ~ n log n since this sequence contains almost all primes. [_Charles R Greathouse IV_, Feb 26 2012]
%o (PARI) p=2;forprime(q=3,1e5,if(q\10-p\10>1,print1(p", "));p=q) \\ _Charles R Greathouse IV_, Feb 26 2012
%Y Cf. A122072.
%K nonn
%O 1,1
%A _Zak Seidov_, Oct 17 2006