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A009917 Coordination sequence T1 for Zeolite Code WEI. 1
1, 4, 9, 18, 32, 51, 74, 98, 126, 163, 199, 237, 288, 335, 383, 449, 506, 564, 646, 713, 780, 878, 955, 1032, 1146, 1232, 1319, 1450, 1544, 1641, 1790, 1892, 1998, 2165, 2275, 2391, 2576, 2693, 2819, 3023, 3146, 3282, 3506, 3635, 3780, 4024, 4159, 4314 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

REFERENCES

W. M. Meier, D. H. Olson and Ch. Baerlocher, Atlas of Zeolite Structure Types, 4th Ed., Elsevier, 1996.

LINKS

R. W. Grosse-Kunstleve, 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

International Zeolite Association, Database of Zeolite Structures

FORMULA

G.f.: (1 + 4*x + 10*x^2 + 20*x^3 + 33*x^4 + 49*x^5 + 62*x^6 + 67*x^7 + 62*x^8 + 51*x^9 + 35*x^10 + 20*x^11 + 8*x^12 - x^14 + 2*x^16 + 2*x^17) / ((1 - x)^3 * (1 + x) * (1 - x + x^2) * (1 + x^2) * (1 + x + x^2)^3). - Colin Barker, Dec 19 2015

CROSSREFS

Sequence in context: A047960 A301090 A190798 * A301095 A301259 A301258

Adjacent sequences:  A009914 A009915 A009916 * A009918 A009919 A009920

KEYWORD

nonn

AUTHOR

Ralf W. Grosse-Kunstleve

STATUS

approved

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Last modified September 25 20:01 EDT 2021. Contains 347659 sequences. (Running on oeis4.)