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.: (x^45+3*x^44+9*x^43+20*x^42+39*x^41+68*x^40+112*x^39+176*x^38+258*x^37+371*x^
36+497*x^35+666*x^34+835*x^33+1053*x^32+1253*x^31+1500*x^30+1708*x^29+1946*x^28
+2126*x^27+2317*x^26+2442*x^25+2549*x^24+2593*x^23+2593*x^22+2549*x^21+2442*x^
20+2317*x^19+2126*x^18+1946*x^17+1708*x^16+1500*x^15+1253*x^14+1053*x^13+835*x^
12+666*x^11+497*x^10+371*x^9+258*x^8+176*x^7+112*x^6+68*x^5+39*x^4+20*x^3+9*x^2
+3*x+1)/(x^7-1)/(x^9-x^8+x^7-x^6+x^5-x^4+x^3-x^2+x-1)/(x-1)/(x^10+x^9+x^8+x^7+x^6
+x^5+x^4+x^3+x^2+x+1)/(x^18+2*x^16+3*x^14+4*x^12+4*x^10+4*x^8+4*x^6+3*x^4+2*x^2+1).
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
STATUS
approved