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Search: id:A066082
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| A066082 |
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Prime octets: n such that 210*n - 105 +/- 2^j are prime, for all 0 < j <= 4. |
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+0
3
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| 242590, 1175444, 2416288, 2583146, 2596049, 2796151, 4953911, 5574794, 6127655, 6396209, 6460877, 6625438, 8521234, 11025856, 11352491, 15482298, 16228703, 18861024, 19048003, 20043534, 22835193, 31519781, 34399756
(list; graph; listen)
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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,...,100
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EXAMPLE
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a(1)=242590 because 210*a(1)-105=50943795 and 50943795-2, -4, -8, -16, +2, +4, +8 and +16 are all prime.
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PROGRAM
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(PARI) { n=0; for (m=1, 10^12, b=210*m - 105; c=0; for (j=1, 4, if (isprime(b - 2^j) , c++, break)); if (c<4, next); for (j=1, 4, if (isprime(b + 2^j) , c++, break)); if (c == 8, write("b066082.txt", n++, " ", m); if (n==100, return)) ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Nov 11 2009]
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CROSSREFS
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A proper subset of A061671 (prime sextets). Cf. prime quadruples A014561. See also A066081.
Sequence in context: A127881 A134857 A078871 this_sequence A140792 A083623 A157761
Adjacent sequences: A066079 A066080 A066081 this_sequence A066083 A066084 A066085
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KEYWORD
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nonn
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AUTHOR
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frank.ellermann(AT)t-online.de, Dec 03 2001
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EXTENSIONS
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More terms from Don Reble (djr(AT)nk.ca), Dec 07 2001
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