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 A078584 a(n) = prime(2n) - prime(2n-1). 7
 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; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS 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, Oct 05 2003 LINKS Table of n, a(n) for n=1..96. EXAMPLE 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. MATHEMATICA Table[ Prime[2n] - Prime[2n - 1], {n, 100}] (* Robert G. Wilson v, May 29 2004 *) CROSSREFS Cf. A000040, A088680, A088682, A088683, A088684. Sequence in context: A097091 A094204 A088681 * A242010 A283673 A198472 Adjacent sequences: A078581 A078582 A078583 * A078585 A078586 A078587 KEYWORD nonn,easy AUTHOR Robert G. Wilson v, Nov 30 2002 EXTENSIONS Edited by N. J. A. Sloane, Sep 15 2008 at the suggestion of R. J. Mathar STATUS approved

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Last modified June 19 23:45 EDT 2024. Contains 373510 sequences. (Running on oeis4.)