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Search: id:A098042
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| A098042 |
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Numbers p such that p = (prime(prime(n))+ prime(prime((n+1)))/2 is prime. |
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+0
1
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| 307, 593, 1459, 1511, 1609, 2399, 2447, 2579, 2903, 4409, 5953, 6317, 7151, 11083, 12491, 14753, 16067, 18199, 18223, 20929, 21787, 23893, 25667, 26317, 31051, 37139, 37573, 37871, 40283, 40471, 41201, 41479, 42013, 44537, 44741, 48409
(list; graph; listen)
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OFFSET
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2,1
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EXAMPLE
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prime(prime(18)) = 283,prime(prime(19)) = 331. 614/2 = 307.
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PROGRAM
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(PARI) g(n, m) = for(x=1, n, y=prime(prime(x+m))+prime(prime(x)); if(y%2==0&isprime(y/2), print1(y\2", ")))
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CROSSREFS
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Sequence in context: A050201 A142376 A142255 this_sequence A125252 A142572 A118284
Adjacent sequences: A098039 A098040 A098041 this_sequence A098043 A098044 A098045
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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), Sep 10 2004
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