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Search: id:A129807
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| A129807 |
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Primes congruent to +-7 mod 18. |
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+0
4
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| 7, 11, 29, 43, 47, 61, 79, 83, 97, 101, 137, 151, 173, 191, 223, 227, 241, 263, 277, 281, 313, 317, 331, 349, 353, 367, 389, 421, 439, 443, 457, 461, 479, 547, 569, 587, 601, 619, 641, 659, 673, 677, 691, 709, 727, 821, 839, 853, 857, 907, 911, 929, 947, 983, 997, 1019
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Also: primes that are sums of three consecutive terms of A001651. These sum to either 3k+1+3k+2+3k+4=9k+7, candidates for A061241, or 3k+2+3k+4+3k+5=9k+11, candidates for A061238. - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jun 10 2007
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REFERENCES
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Emma Lehmer, On special primes, Pac. J. Math., 118 (1985), 471-478.
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FORMULA
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Conjecture: Equals (A061241 UNION A061238) MINUS {2}. - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jun 10 2007
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MATHEMATICA
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Select[Prime[Range[1000]], MemberQ[{7, 11}, Mod[ #, 18]]&] - Zak Seidov (zakseidov(AT)yahoo.com), May 23 2007
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CROSSREFS
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Adjacent sequences: A129804 A129805 A129806 this_sequence A129808 A129809 A129810
Sequence in context: A136338 A110572 A023254 this_sequence A045461 A109907 A083363
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KEYWORD
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nonn
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AUTHOR
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njas, May 22 2007
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