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A063911
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Numbers n such that n and 2n-9 are primes.
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2
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7, 11, 13, 19, 23, 31, 41, 53, 59, 61, 73, 79, 83, 101, 103, 139, 151, 163, 173, 179, 181, 191, 199, 229, 233, 283, 293, 311, 313, 331, 359, 383, 389, 409, 419, 431, 433, 443, 503, 509, 521, 563, 569, 601, 613, 619, 643, 653, 691, 709, 719
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,1
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LINKS
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Harry J. Smith, Table of n, a(n) for n=1,...,1000
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PROG
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(PARI) { n=0; p=1; for (m=1, 10^9, p=nextprime(p+1); if (isprime(2*p - 9), write("b063911.txt", n++, " ", p); if (n==1000, break)) ) } [From Harry J. Smith, Sep 02 2009]
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CROSSREFS
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Sequence in context: A091932 A165349 A160024 * A087489 A155488 A100350
Adjacent sequences: A063908 A063909 A063910 * A063912 A063913 A063914
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane, Aug 31 2001
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STATUS
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approved
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