OFFSET
0,2
COMMENTS
Inorganic Crystal Structure Database: Collection Code 18112.
LINKS
Sean A. Irvine, Table of n, a(n) for n = 0..1000
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.
FORMULA
G.f.: (x^34 +3*x^33 +6*x^32 +10*x^31 +6*x^30 +3*x^29 -13*x^28 -20*x^27 -40*x^26 -40*x^25 -48*x^24 -64*x^23 -114*x^22 -239*x^21 -458*x^20 -793*x^19 -1228*x^18 -1737*x^17 -2222*x^16 -2652*x^15 -2904*x^14 -2980*x^13 -2831*x^12 -2522*x^11 -2072*x^10 -1598*x^9 -1126*x^8 -737*x^7 -438*x^6 -233*x^5 -111*x^4 -46*x^3 -17*x^2 -5*x -1) / (x^2 +1) / (x^6 +x^5 -x -1) / (x^7 -1) / (x^4 +x^2 +1)^2 / (x -1) / (x^2 +x +1).
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
mgeorg(AT)ntu.edu.sg (Georg Thimm); Ralf W. Grosse-Kunstleve
STATUS
approved