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A122384 Numbers appearing in A122072 at least three times. 2

%I

%S 1129,1327,1669,2179,2477,3137,3229,3469,3739,4177,4297,4759,4831,

%T 5119,5237,5351,5449,5591,5749,5953,6397,6491,6737,6917,7079,7129,

%U 7253,7369,7759,7963,8329,8389,8467,8893,9067,9349,9439,9551,9973,10009,10039

%N Numbers appearing in A122072 at least three times.

%C Necessary condition: p is followed by a prime gap of at least 22. Sufficient condition: p is followed by a prime gap of at least 30. [_Charles R Greathouse IV_, Feb 26 2012]

%H Charles R Greathouse IV, <a href="/A122384/b122384.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>2,print1(p", "));p=q) \\ _Charles R Greathouse IV_, Feb 26 2012

%Y Cf. A122091, A122072.

%K nonn

%O 1,1

%A _Zak Seidov_, Oct 19 2006

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Last modified January 27 16:33 EST 2022. Contains 350609 sequences. (Running on oeis4.)