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Search: id:A095672
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| A095672 |
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Primes p = p_(n+1) such that p_n + p_(n+2) = 2*p_(n+1) + 4. |
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8
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| 31, 61, 73, 151, 271, 293, 337, 401, 433, 491, 547, 571, 577, 601, 743, 761, 839, 911, 1033, 1039, 1063, 1201, 1231, 1291, 1321, 1409, 1453, 1531, 1571, 1621, 1627, 2003, 2017, 2039, 2131, 2243, 2273, 2341, 2383, 2551, 2663, 2713, 2719, 2791, 3041, 3049
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Primes that are first prime chords.
These come from music based on the prime differences where the chords are an even number of note steps from the primary note.
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EXAMPLE
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31 is a term because 29+37 = 2*31 + 4 = 66.
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MATHEMATICA
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m = 1; Prime[1 + Select[ Range[450], Prime[ # + 2] - 2*Prime[ # + 1] + Prime[ # ] - 4*m == 0 &]] (from Robert G. Wilson v Jul 14 2004)
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CROSSREFS
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Cf. A095419, A095420, A095648, A095649, A095650, A095651, A095673.
Sequence in context: A063339 A115833 A052158 this_sequence A073650 A078562 A054804
Adjacent sequences: A095669 A095670 A095671 this_sequence A095673 A095674 A095675
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KEYWORD
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nonn
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AUTHOR
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Roger L. Bagula (rlbagulatftn(AT)yahoo.com), Jul 02 2004
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EXTENSIONS
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Edited by Robert G. Wilson v (rgwv(AT)rgwv.com), Jul 14 2004
Description corrected by njas, Jul 19 2004.
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