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
a(5m)=57m^2+2, a(5m+1)=57m^2+24m+4, a(5m+2)=57m^2+46m+11, a(5m+3)=57m^2+68m+22, a(5m+4)=57m^2+90m+37 (N. J. A. Sloane).
G.f.: (1+x)*(1+2*x+5*x^2+6*x^3+9*x^4+11*x^5+9*x^6+6*x^7+5*x^8+2*x^9+x^10) / ((1-x)^3*(1+x+x^2+x^3+x^4)^2). - Colin Barker, Dec 19 2015
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
STATUS
approved