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A068220
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Twin primes belonging to packs of four or more twin pairs.
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0
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9419, 9421, 9431, 9433, 9437, 9439, 9461, 9463, 62969, 62971, 62981, 62983, 62987, 62989, 63029, 63031, 72221, 72223, 72227, 72229, 72251, 72253, 72269, 72271, 392261, 392263, 392267, 392269, 392279, 392281, 392297, 392299, 495569
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| A twin pack of primes contains 2 or more pairs of twin primes, between which pairs there are no other primes. 9419,9421,9431,9433,9437,9439,9461,9463 are in the sequence because they are consecutive primes which belong to more than 3 twin pairs. 137,139,149,151 are not because they belong to a pack of only 2 pairs.
Could be called unrestricted prime octets. - Harry J. Smith (hjsmithh(AT)sbcglobal.net), Dec 16 2007
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CROSSREFS
| Cf. A001097, A035792, A069457.
Sequence in context: A031595 A031775 A143367 * A136145 A035792 A202099
Adjacent sequences: A068217 A068218 A068219 * A068221 A068222 A068223
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KEYWORD
| nonn
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AUTHOR
| N. Fernandez (primeness(AT)borve.org), Mar 24 2002
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EXTENSIONS
| More terms from Harry J. Smith (hjsmithh(AT)sbcglobal.net), Dec 16 2007
Edited by N. J. A. Sloane (njas(AT)research.att.com), May 15 2008 at the suggestion of R. J. Mathar
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