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 A130727 List of triples 2n+1, 2n+3, 2n+2. 0
 1, 3, 2, 3, 5, 4, 5, 7, 6, 7, 9, 8, 9, 11, 10, 11, 13, 12, 13, 15, 14, 15, 17, 16, 17, 19, 18, 19, 21, 20, 21, 23, 22, 23, 25, 24, 25, 27, 26, 27, 29, 28, 29, 31, 30, 31, 33, 32, 33, 35, 34, 35, 37, 36, 37, 39, 38, 39, 41, 40, 41, 43, 42, 43, 45, 44, 45, 47, 46, 47, 49, 48, 49, 51 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 LINKS Index entries for linear recurrences with constant coefficients, signature (1,0,1,-1). FORMULA a(n) = (2/9)*(3*n+6-3*cos(2*(n+4)*Pi/3)-2*sqrt(3)*sin(2*(n+4)*Pi/3)). - Wesley Ivan Hurt, Sep 26 2017 MATHEMATICA LinearRecurrence[{1, 0, 1, -1}, {1, 3, 2, 3}, 80] (* Harvey P. Dale, Aug 12 2016 *) {#[[1]], #[[3]], #[[2]]}&/@Partition[Range[60], 3, 2]//Flatten (* Harvey P. Dale, Jul 17 2021 *) CROSSREFS Sequence in context: A128151 A071166 A140358 * A155515 A023605 A223542 Adjacent sequences: A130724 A130725 A130726 * A130728 A130729 A130730 KEYWORD nonn,easy AUTHOR Paul Curtz, Aug 17 2007 EXTENSIONS Edited by N. J. A. Sloane, Sep 15 2007 STATUS approved

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Last modified January 31 05:18 EST 2023. Contains 359947 sequences. (Running on oeis4.)