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Search: id:A078584
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| A078584 |
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Prime (2n) - prime (2n-1). |
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+0
7
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| 1, 2, 2, 2, 6, 6, 2, 6, 2, 4, 6, 6, 4, 4, 4, 4, 2, 2, 6, 6, 2, 2, 2, 12, 2, 6, 10, 6, 2, 4, 10, 4, 4, 6, 2, 6, 6, 4, 8, 8, 2, 2, 4, 8, 2, 12, 4, 4, 12, 18, 10, 6, 6, 6, 2, 6, 2, 10, 4, 6, 12, 6, 10, 10, 6, 4, 6, 8, 14, 12, 10, 4, 10, 4, 4, 4, 4, 4, 10, 4, 6, 4, 6, 6, 4, 2, 2, 10, 10, 6, 4, 4, 6, 6, 22, 10
(list; graph; listen)
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OFFSET
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1,2
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COMMENT
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First differences of A077133. Bisection of A001223.
Partition the primes in pairs starting with 5: (5, 7), (11, 13), (17, 19), (23, 29), (31, 37), (41, 43), (47, 53). Sequence gives differences between pairs. - Zak Seidov (zakseidov(AT)yahoo.com), Oct 05 2003
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EXAMPLE
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a(4)=6 as a_o(5)=58 - a_e(5)=71 is 13 and a_o(4)=35 - a_e(4)=42 is 7 and the difference is 6.
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MATHEMATICA
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Table[ Prime[2n] - Prime[2n - 1], {n, 100}] (from Robert G. Wilson v May 29 2004)
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CROSSREFS
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Cf. A000040, A088680, A088682, A088683, A088684.
Sequence in context: A097091 A094204 A088681 this_sequence A080969 A032558 A139552
Adjacent sequences: A078581 A078582 A078583 this_sequence A078585 A078586 A078587
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KEYWORD
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nonn,easy
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AUTHOR
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Robert G. Wilson v (rgwv(AT)rgwv.com), Nov 30 2002
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EXTENSIONS
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Edited by njas, Sep 15 2008 at the suggestion of R. J. Mathar
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