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Search: id:A105409
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| A105409 |
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Indices n of primes p(n), p(n+2) such that p(n)-2 and p(n+2)-2 are both prime. |
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+0
1
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| 4, 6, 27, 34, 42, 44, 82, 141, 143, 172, 177, 235, 287, 295, 314, 319, 429, 459, 474, 476, 485, 578, 580, 585, 672, 744, 773, 863, 871, 873, 892, 935, 958, 1031, 1116, 1166, 1168, 1170, 1231, 1340, 1352, 1405, 1463, 1549, 1622, 1652, 1708, 1824, 1834, 1868
(list; graph; listen)
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OFFSET
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2,1
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PROGRAM
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(PARI) pnpk(n, m, k) = \ both are prime { local(x, l1, l2, v1, v2); for(x=1, n, v1 = prime(x)+ k; v2 = prime(x+m)+k; if(isprime(v1)&isprime(v2), \ print1(x", ") print1(v1", ") ) ) }
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CROSSREFS
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Cf. A053778.
Sequence in context: A099941 A074120 A054265 this_sequence A109934 A068321 A012896
Adjacent sequences: A105406 A105407 A105408 this_sequence A105410 A105411 A105412
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KEYWORD
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nonn
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AUTHOR
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Cino Hilliard (hillcino368(AT)gmail.com), May 01 2005
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