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Search: id:A087373
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| A087373 |
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Twin prime index primes (TWIPS). |
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+0
1
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| 5, 11, 17, 31, 41, 59, 109, 179, 191, 283, 599, 859, 1063, 1153, 1723, 2081, 2341, 3001, 3259, 3299, 4421, 4549, 4787, 4933, 6361, 6661, 8221, 8233, 8389, 10009, 10457, 10861, 13693, 13709, 16141, 16693, 16901, 17387, 17659, 20441, 20477, 20773
(list; graph; listen)
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OFFSET
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3,1
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COMMENT
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If twin primes are infinite prove these numbers are infinite.
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EXAMPLE
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17 is a twin prime paired with 19. The 17th prime is 59 which is also a
twin prime paired with 61.
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PROGRAM
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(PARI) twips(n) = { forprime(x=3, n, x1=prime(x); if(isprime(x-2) || isprime(x+2), if(isprime(x1-2) || isprime(x1+2), print1(x1", ") ) ) ) }
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CROSSREFS
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Sequence in context: A068072 A136292 A088046 this_sequence A030468 A085634 A088903
Adjacent sequences: A087370 A087371 A087372 this_sequence A087374 A087375 A087376
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KEYWORD
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easy,nonn
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AUTHOR
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Cino Hilliard (hillcino368(AT)gmail.com), Oct 21 2003
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