The On-Line Encyclopedia of Integer Sequences (OEIS)

A008240 revision #13

A008240

Coordination sequence T3 for Zeolite Code THO.

1, 4, 8, 18, 34, 50, 68, 100, 130, 160, 204, 246, 286, 338, 392, 448, 514, 580, 648, 726, 802, 878, 968, 1060, 1150, 1252, 1356, 1458, 1570, 1682, 1796, 1924, 2050, 2176, 2316, 2454, 2590, 2738, 2888, 3040, 3202, 3364, 3528, 3702, 3874, 4046, 4232, 4420

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,2

REFERENCES

W. M. Meier, D. H. Olson and Ch. Baerlocher, Atlas of Zeolite Structure Types, 4th Ed., Elsevier, 1996

LINKS

Table of n, a(n) for n=0..47.

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.

International Zeolite Association, Database of Zeolite Structures

FORMULA

a(24*m+k) = 1152*m^2 + 96*k*m + one of 24 numbers depending on k, 0<=k<24. - N. J. A. Sloane

Empirical g.f.: (1+2*x+2*x^2+7*x^3+6*x^4+6*x^5+2*x^6+14*x^7-x^8+10*x^9-2*x^10+5*x^11-8*x^12+4*x^13) / ((1-x)^3*(1+x^2)*(1+x+x^2)*(1+x^4)). - Colin Barker, Dec 20 2015

CROSSREFS

Sequence in context: A008373 A008374 A201686 * A008375 A056309 A007784

Adjacent sequences: A008237 A008238 A008239 * A008241 A008242 A008243

KEYWORD

nonn,easy

AUTHOR

R. W. Grosse-Kunstleve (rwgk(AT)cci.lbl.gov)

STATUS

editing