login
A009923
Coordination sequence for CaF2(1), Ca position.
1
1, 8, 36, 78, 140, 230, 308, 438, 572, 710, 884, 1086, 1260, 1502, 1748, 1982, 2268, 2582, 2852, 3206, 3564, 3894, 4292, 4718, 5084, 5550, 6020, 6446, 6956, 7494, 7956, 8534, 9116, 9638, 10260, 10910, 11468, 12158, 12852, 13470, 14204, 14966
OFFSET
0,2
REFERENCES
Gmelin Handbook of Inorg. and Organomet. Chem., 8th Ed., 1994, TYPIX search code (225) cF12.
FORMULA
G.f.: -(6*x^9-5*x^8+8*x^7+29*x^6+82*x^5+88*x^4+68*x^3+35*x^2+8*x+1) / ((x-1)^3*(x+1)*(x^2+x+1)^2). - Colin Barker, Dec 12 2012
MATHEMATICA
CoefficientList[Series[-(6 x^9 - 5 x^8 + 8 x^7 + 29 x^6 + 82 x^5 + 88 x^4 + 68 x^3 + 35 x^2 + 8 x + 1)/((x - 1)^3 (x + 1) (x^2 + x + 1)^2), {x, 0, 50}], x] (* Vincenzo Librandi, Oct 15 2013 *)
CROSSREFS
Sequence in context: A048740 A139608 A321778 * A187287 A224159 A321251
KEYWORD
nonn,easy
STATUS
approved