

A122384


Numbers appearing in A122072 at least three times.


2



1129, 1327, 1669, 2179, 2477, 3137, 3229, 3469, 3739, 4177, 4297, 4759, 4831, 5119, 5237, 5351, 5449, 5591, 5749, 5953, 6397, 6491, 6737, 6917, 7079, 7129, 7253, 7369, 7759, 7963, 8329, 8389, 8467, 8893, 9067, 9349, 9439, 9551, 9973, 10009, 10039
(list;
graph;
refs;
listen;
history;
text;
internal format)



OFFSET

1,1


COMMENTS

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]


LINKS

Charles R Greathouse IV, Table of n, a(n) for n = 1..10000


FORMULA

a(n) ~ n log n since this sequence contains almost all primes. [Charles R Greathouse IV, Feb 26 2012]


PROG

(PARI) p=2; forprime(q=3, 1e5, if(q\10p\10>2, print1(p", ")); p=q) \\ Charles R Greathouse IV, Feb 26 2012


CROSSREFS

Cf. A122091, A122072.
Sequence in context: A278434 A198469 A082888 * A218041 A061779 A218159
Adjacent sequences: A122381 A122382 A122383 * A122385 A122386 A122387


KEYWORD

nonn


AUTHOR

Zak Seidov, Oct 19 2006


STATUS

approved



