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Search: id:A141644
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| A141644 |
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Primes of the form (p(2n)-p(n))/7*2, where p(n)=n-th prime. |
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1
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| 3, 19, 41, 173, 181, 281, 347, 373, 401, 409, 433, 449, 461, 461, 479, 499, 509, 541, 547, 571, 577, 619, 691, 701, 709, 859, 881, 919, 929, 1087, 1091, 1093, 1097, 1193, 1229, 1367, 1367, 1481, 1483, 1511, 1523, 1553, 1559, 1579, 1601, 1667, 1697, 1699
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OFFSET
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1,1
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EXAMPLE
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If n=10, then (p(10*2)-p(10))/7*2=(71-29)/14=3=a(1).
If n=45, then (p(45*2)-p(45))/7*2=(463-197)/14=19=a(2).
If n=85, then (p(85*2)-p(85))/7*2=(1013-439)/14=41=a(3).
If n=300, then (p(300*2)-p(300))/7*2=(4409-1987)/14=173=a(4).
If n=311, then (p(311*2)-p(311))/7*2=(4597-2063)/14=181=a(5).
If n=459, then (p(459*2)-p(459))/7*2=(7187-3253)/14=281=a(6), etc.
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CROSSREFS
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Cf. A000040.
Cf. A072473. [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Oct 04 2008]
Sequence in context: A114704 A131542 A042371 this_sequence A141170 A141373 A107154
Adjacent sequences: A141641 A141642 A141643 this_sequence A141645 A141646 A141647
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KEYWORD
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nonn
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AUTHOR
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Juri-Stepan Gerasimov (2stepan(AT)rambler.ru), Sep 18 2008
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EXTENSIONS
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More terms from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Oct 04 2008
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