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A009925 Coordination sequence for CaF2(2), F position. 1
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 (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 (225) cF12

LINKS

Vincenzo Librandi, 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.

Index to sequences with linear recurrences with constant coefficients, signature (0,3,0,-3,0,1).

FORMULA

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]

MATHEMATICA

CoefficientList[Series[-(x^6 + 4 x^5 + 19 x^4 + 12 x^3 + 19 x^2 + 4 x + 1)/((x - 1)^3 (x + 1)^3), {x, 0, 50}], x] (* Vincenzo Librandi, Oct 15 2013 *)

CROSSREFS

Sequence in context: A121006 A185866 A043061 * A059653 A022385 A244411

Adjacent sequences:  A009922 A009923 A009924 * A009926 A009927 A009928

KEYWORD

nonn,easy

AUTHOR

rwgk(AT)cci.lbl.gov (R.W. Grosse-Kunstleve)

STATUS

approved

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Last modified November 27 04:47 EST 2014. Contains 250155 sequences.