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 A204890 Ordered differences of primes. 70
 1, 3, 2, 5, 4, 2, 9, 8, 6, 4, 11, 10, 8, 6, 2, 15, 14, 12, 10, 6, 4, 17, 16, 14, 12, 8, 6, 2, 21, 20, 18, 16, 12, 10, 6, 4, 27, 26, 24, 22, 18, 16, 12, 10, 6, 29, 28, 26, 24, 20, 18, 14, 12, 8, 2, 35, 34, 32, 30, 26, 24, 20, 18, 14, 8, 6, 39, 38, 36, 34, 30, 28, 24, 22 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS For a guide to related sequences, see A204892. A086800, zeros omitted. - R. J. Mathar, Sep 15 2012 LINKS EXAMPLE a(1) = p(2)-p(1) = 3-2 = 1 a(2) = p(3)-p(1) = 5-2 = 3 a(3) = p(3)-p(2) = 5-3 = 2 a(4) = p(4)-p(1) = 7-2 = 5 a(5) = p(4)-p(2) = 7-3 = 4 a(6) = p(4)-p(3) = 7-5 = 2 From Michel Marcus, May 12 2016: (Start) As a triangle, first rows are: 1; 3, 2; 5, 4, 2; 9, 8, 6, 4; 11, 10, 8, 6, 2; (End) MATHEMATICA (See the program at A204892.) With[{prs=Prime[Range[20]]}, Flatten[Table[prs[[n]]-Take[prs, n-1], {n, 2, Length[prs]}]]] (* Harvey P. Dale, Dec 01 2013 *) PROG (PARI) tabl(nn) = {for (n=2, nn, for (m=1, n-1, print1(prime(n) - prime(m), ", "); ); print(); ); } \\ Michel Marcus, May 12 2016 CROSSREFS Cf. A204892, A090321. Sequence in context: A143124 A205400 A205850 * A307775 A239680 A128076 Adjacent sequences: A204887 A204888 A204889 * A204891 A204892 A204893 KEYWORD nonn,tabl,easy AUTHOR Clark Kimberling, Jan 20 2012 STATUS approved

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Last modified April 1 18:40 EDT 2023. Contains 361695 sequences. (Running on oeis4.)