%I #6 Apr 08 2018 16:04:10
%S 1,4,10,20,34,58,82,108,144,186,222,268,330,386,430,500,592,658,706,
%T 804,930,1002,1050,1180,1344,1418,1462,1628,1834,1906,1942,2148,2400,
%U 2466,2490,2740,3042,3098,3106,3404,3760,3802,3790,4140,4554,4578,4542
%N Coordination sequence T1 for Zeolite Code NPO.
%H R. W. Grosse-Kunstleve, <a href="/A301139/b301139.txt">Table of n, a(n) for n = 0..1000</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 + 4*x + 10*x^2 + 20*x^3 + 31*x^4 + 46*x^5 + 52*x^6 + 48*x^7 + 45*x^8 + 24*x^9 + 6*x^10 + 4*x^11 - x^12 - 2*x^13) / (1 - x^4)^3.
%K nonn
%O 0,2
%A _Sean A. Irvine_, Mar 18 2018