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 A199930 Trisection 0 of A199803. 1
 1, -2, -1, 12, -10, -49, 112, 111, -710, 316, 3233, -5634, -9505, 40592, -1934, -204897, 264664, 717295, -2243578, -873336, 12543857, -11138050, -50210993, 119318436, 108054622, -743719745, 372976064, 3334358847, -6051013534, -9504084892, 42720535345, -4585483266, -212470264817, 287622301384 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 COMMENTS Also trisection 1 of A199744, negated. LINKS Colin Barker, Table of n, a(n) for n = 0..1000 Michael D. Hirschhorn, 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.: (1 - x + 2*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) PROG (PARI) Vec((1 - x + 2*x^2) / (1 + x + 5*x^2 - x^3 + x^4) + O(x^40)) \\ Colin Barker, Dec 27 2017 CROSSREFS Sequence in context: A268512 A217109 A297967 * A278330 A048854 A151508 Adjacent sequences:  A199927 A199928 A199929 * A199931 A199932 A199933 KEYWORD sign,easy AUTHOR N. J. A. Sloane, Nov 12 2011 STATUS approved

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Last modified July 28 00:54 EDT 2021. Contains 346316 sequences. (Running on oeis4.)