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A008124
Coordination sequence T1 for Zeolite Code LAU.
1
1, 4, 10, 20, 33, 51, 74, 99, 128, 161, 199, 243, 288, 333, 386, 449, 511, 571, 638, 715, 796, 874, 954, 1044, 1142, 1239, 1336, 1439, 1549, 1665, 1781, 1898, 2022, 2153, 2286, 2421, 2561, 2704, 2853, 3007, 3162, 3320, 3484, 3654, 3826, 4000, 4179, 4365
OFFSET
0,2
REFERENCES
W. M. Meier, D. H. Olson and Ch. Baerlocher, Atlas of Zeolite Structure Types, 4th Ed., Elsevier, 1996
FORMULA
G.f.: (1 + x)^3 * (1 + x + 5*x^2 + 5*x^3 + 12*x^4 + 14*x^5 + 20*x^6 + 24*x^7 + 28*x^8 + 29*x^9 + 33*x^10 + 29*x^11 + 28*x^12 + 24*x^13 + 20*x^14 + 14*x^15 + 12*x^16 + 5*x^17 + 5*x^18 + x^19 + x^20) / ((1 - x)^3 * (1 + x^2) * (1 + x + x^2) * (1 + x + x^2 + x^3 + x^4) * (1 + x^3 + x^6) * (1 + x + x^2 + x^3 + x^4 + x^5 + x^6)). - Colin Barker, Dec 19 2015
CROSSREFS
Sequence in context: A008142 A008045 A374715 * A019457 A360050 A099589
KEYWORD
nonn
STATUS
approved