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A064974 Numbers k such that k-1, k-3, k-7 and k-9 are all prime. 2
14, 20, 110, 200, 830, 1490, 1880, 2090, 3260, 3470, 5660, 9440, 13010, 15650, 15740, 16070, 18050, 18920, 19430, 21020, 22280, 25310, 31730, 34850, 43790, 51350, 55340, 62990, 67220, 69500, 72230, 77270, 79700, 81050, 82730, 88820 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
MATHEMATICA
Select[Range[10^5], PrimeQ[ # - 1] && PrimeQ[ # - 3] && PrimeQ[ # - 7] && PrimeQ[ # - 9] &]
PROG
(PARI) { n=0; for (m=1, 10^9, if(isprime(m - 1) && isprime(m - 3) && isprime(m - 7) && isprime(m - 9), write("b064974.txt", n++, " ", m); if (n==1000, return)) ) } \\ Harry J. Smith, Oct 02 2009
CROSSREFS
Cf. A090258.
Sequence in context: A015797 A293184 A368408 * A167335 A129244 A070719
KEYWORD
easy,nonn
AUTHOR
Robert G. Wilson v, Oct 30 2001
STATUS
approved

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Last modified July 21 13:28 EDT 2024. Contains 374474 sequences. (Running on oeis4.)