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A009925
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Coordination sequence for CaF2(2), F position.
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0
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1, 4, 22, 24, 82, 64, 182, 124, 322, 204, 502, 304, 722, 424, 982, 564, 1282, 724, 1622, 904, 2002, 1104, 2422, 1324, 2882, 1564, 3382, 1824, 3922, 2104, 4502, 2404, 5122, 2724, 5782, 3064, 6482, 3424, 7222, 3804, 8002, 4204, 8822, 4624, 9682, 5064
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OFFSET
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0,2
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REFERENCES
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Gmelin Handbook of Inorg. and Organomet. Chem., 8th Ed., 1994, TYPIX search code (225) cF12
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LINKS
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Table of n, a(n) for n=0..45.
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.
Index to sequences with linear recurrences with constant coefficients, signature (0,3,0,-3,0,1).
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FORMULA
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G.f.: -(x^6+4*x^5+19*x^4+12*x^3+19*x^2+4*x+1) / ((x-1)^3*(x+1)^3). [Colin Barker, Dec 12 2012]
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CROSSREFS
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Sequence in context: A121006 A185866 A043061 * A059653 A022385 A213240
Adjacent sequences: A009922 A009923 A009924 * A009926 A009927 A009928
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KEYWORD
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nonn,easy
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AUTHOR
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rwgk(AT)cci.lbl.gov (R.W. Grosse-Kunstleve)
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STATUS
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approved
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