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 A199929 Trisection 2 of A199802. 1
 2, -4, -5, 27, -8, -128, 200, 405, -1525, -172, 8002, -9072, -29585, 83119, 47732, -483840, 357884, 2025929, -4346921, -4941000, 28343650, -10011500, -132300829, 215642979, 407506016, -1608010240, -81576032, 8313490269, -9921126365, -30119890772, 88120588898, 44244248328, -505045957225 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 LINKS Colin Barker, Table of n, a(n) for n = 0..1000 Hirschhorn, Michael D., Non-trivial intertwined second-order recurrence relations, Fibonacci Quart. 43 (2005), no. 4, 316-325. See p. 324. Index entries for linear recurrences with constant coefficients, signature (-1,-5,1,-1). FORMULA From Colin Barker, Dec 27 2017: (Start) G.f.: (2 - 2*x + x^2) / (1 + x + 5*x^2 - x^3 + x^4). a(n) = -a(n-1) - 5*a(n-2) + a(n-3) - a(n-4) for n>3. (End) MATHEMATICA LinearRecurrence[{-1, -5, 1, -1}, {2, -4, -5, 27}, 40] (* Harvey P. Dale, May 26 2018 *) PROG (PARI) Vec((2 - 2*x + x^2) / (1 + x + 5*x^2 - x^3 + x^4) + O(x^40)) \\ Colin Barker, Dec 27 2017 CROSSREFS Sequence in context: A036985 A179133 A277371 * A126666 A036983 A303006 Adjacent sequences:  A199926 A199927 A199928 * A199930 A199931 A199932 KEYWORD sign,easy AUTHOR N. J. A. Sloane, Nov 12 2011 STATUS approved

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Last modified October 21 22:47 EDT 2019. Contains 328315 sequences. (Running on oeis4.)