A008268 Coordination sequence T2 for Coesite.

1, 4, 10, 23, 47, 83, 127, 174, 221, 276, 356, 428, 494, 603, 698, 781, 912, 1035, 1131, 1289, 1435, 1542, 1735, 1903, 2014, 2245, 2435, 2556, 2817, 3032, 3160, 3459, 3694, 3824, 4166, 4426, 4551, 4937, 5222, 5345, 5771, 6083, 6204, 6675, 7004, 7125, 7645

Offset

0,2

References

Inorganic Crystal Structure Database: Collection Code 18112.

Links

Sean A. Irvine, Table of n, a(n) for n = 0..1000

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.

Index entries for linear recurrences with constant coefficients, signature (-2,-4,-4,-4,-1,2,7,10,12,10,6,0,-6,-10,-12,-10,-7,-2,1,4,4,4,2,1).

Formula

G.f.: [ 1 ]^3 * poly of degree 32 / [ 3 ][ 3 ][ 4 ][ 5 ][ 6 ][ 7 ], where [ k ] = (1-x^k). - Colin Mallows

Crossrefs

Cf. A008267.

Sequence in context: A024980 A002766 A305102 * A084446 A209815 A158671

Adjacent sequences: A008265 A008266 A008267 * A008269 A008270 A008271

Keyword

nonn,easy,changed

Author

Georg Thimm (mgeorg(AT)ntu.edu.sg) and Ralf W. Grosse-Kunstleve

Status

approved