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%I #15 Apr 10 2018 08:26:36
%S 1,4,9,18,32,48,67,91,119,151,185,224,268,313,364,417,472,533,596,666,
%T 737,811,893,975,1065,1154,1244,1344,1443,1550,1656,1766,1887,2004,
%U 2132,2258,2385,2523,2657,2803,2945,3090,3248,3401,3568,3729,3892,4069
%N Coordination sequence T4 for Zeolite Code CGS.
%H R. W. Grosse-Kunstleve, <a href="/A027368/b027368.txt">Table of n, a(n) for n = 0..1000</a>
%H R. W. Grosse-Kunstleve, <a href="/A005897/a005897.html">Coordination Sequences and Encyclopedia of Integer Sequences</a>
%H Sean A. Irvine, <a href="/A008000/a008000_1.pdf">Generating Functions for Coordination Sequences of Zeolites, after Grosse-Kunstleve, Brunner, and Sloane</a>
%H International Zeolite Association, <a href="http://www.iza-structure.org/databases/">Database of Zeolite Structures</a>
%F G.f.: (1 + x) * (1 + x + 2*x^2 + 4*x^3 + 4*x^4 + 3*x^5 + 7*x^6 + 5*x^7 + 7*x^8 + 8*x^9 + 8*x^10 + 8*x^11 + 7*x^12 + 5*x^13 + 7*x^14 + 3*x^15 + 4*x^16 + 4*x^17 + 2*x^18 + x^19 + x^20) / ((1 - x)^3 * (1 + x^2) * (1 - x + x^2 - x^3 + x^4) * (1 - x^2 + x^4) * (1 + x + x^2 + x^3 + x^4)^2). - _Colin Barker_, Dec 21 2015
%K nonn
%O 0,2
%A _Ralf W. Grosse-Kunstleve_
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