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 A008252 Coordination sequence T2 for Cordierite. 1
 1, 4, 11, 23, 46, 70, 100, 131, 177, 230, 280, 332, 395, 471, 554, 620, 714, 797, 909, 998, 1120, 1226, 1353, 1453, 1618, 1736, 1906, 1995, 2195, 2336, 2540, 2646, 2861, 3011, 3268, 3374, 3642, 3771, 4071, 4194, 4502, 4648, 4961, 5083, 5456, 5600, 5976 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 REFERENCES Inorganic Crystal Structure Database: Collection Code 30947. 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. Sean A. Irvine, Generating Functions for Coordination Sequences of Zeolites, after Grosse-Kunstleve, Brunner, and Sloane FORMULA G.f.: (1 + 5*x + 16*x^2 + 40*x^3 + 88*x^4 + 159*x^5 + 252*x^6 + 359*x^7 + 459*x^8 + 535*x^9 + 566*x^10 + 547*x^11 + 481*x^12 + 381*x^13 + 272*x^14 + 167*x^15 + 92*x^16 + 38*x^17 + 10*x^18 - x^19 - x^20 - 2*x^21) / ((1 - x)^3 * (1 + x)^3 * (1 - x + x^2) * (1 + x^2)^2 * (1 + x + x^2 + x^3 + x^4)^2). - Colin Barker, Dec 23 2015 CROSSREFS Sequence in context: A008214 A008104 A227358 * A182707 A022495 A238489 Adjacent sequences: A008249 A008250 A008251 * A008253 A008254 A008255 KEYWORD nonn AUTHOR Ralf W. Grosse-Kunstleve STATUS approved

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Last modified September 21 17:55 EDT 2023. Contains 365503 sequences. (Running on oeis4.)