OFFSET
0,2
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
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.: (1 + x) * (1 + 2*x + 7*x^2 + x^3 + 12*x^4 + 10*x^5 + 18*x^6 - x^7 + 11*x^8 - 4*x^9 + 5*x^10 - 4*x^11 + 2*x^12) / ((1 - x)^3 * (1 + x^2) * (1 + x + x^2) * (1 + x + x^2 + x^3 + x^4)). - Colin Barker, Dec 20 2015
CROSSREFS
KEYWORD
nonn
AUTHOR
STATUS
approved