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 A009931 Coordination sequence for MgCu2, Mg position. 1
 1, 16, 52, 130, 244, 380, 538, 784, 986, 1268, 1588, 1930, 2236, 2764, 3086, 3592, 4126, 4676, 5084, 5962, 6364, 7096, 7846, 8624, 9094, 10372, 10808, 11786, 12760, 13768, 14254, 16000, 16430, 17656, 18856, 20114, 20576, 22840, 23218, 24712 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 REFERENCES Gmelin Handbook of Inorg. and Organomet. Chem., 8th Ed., 1994, TYPIX search code (227) cF24. LINKS Sean A. Irvine, Table of n, a(n) for n = 0..1000 R. W. Grosse-Kunstleve, Coordination Sequences and Encyclopedia of Integer Sequences R. W. Grosse-Kunstleve, G. O. Brunner and N. J. A. Sloane, Algebraic Description of Coordination Sequences and Exact Topological Densities for Zeolites, Acta Cryst., A52 (1996), pp. 879-889. FORMULA From Colin Barker, Feb 13 2018: (Start) G.f.: (1 + 19*x + 104*x^2 + 351*x^3 + 852*x^4 + 1577*x^5 + 2287*x^6 + 2666*x^7 + 2517*x^8 + 1921*x^9 + 1166*x^10 + 547*x^11 + 182*x^12 + 35*x^13 + x^14) / ((1 - x)^3*(1 + x)^3*(1 + x^2)*(1 + x + x^2)^3). a(n) = - 3*a(n-1) - 4*a(n-2) - a(n-3) + 6*a(n-4) + 11*a(n-5) + 9*a(n-6) - 9*a(n-8) - 11*a(n-9) - 6*a(n-10) + a(n-11) + 4*a(n-12) + 3*a(n-13) + a(n-14) for n>14. (End) CROSSREFS Sequence in context: A009939 A009935 A241490 * A009936 A217736 A211578 Adjacent sequences: A009928 A009929 A009930 * A009932 A009933 A009934 KEYWORD nonn AUTHOR STATUS approved

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Last modified March 29 01:21 EDT 2023. Contains 361596 sequences. (Running on oeis4.)