A057313 Coordination sequence T2 for Zeolite Code SAS.

1, 4, 9, 17, 30, 48, 68, 87, 109, 142, 184, 224, 255, 287, 338, 406, 470, 515, 555, 620, 712, 802, 865, 915, 992, 1104, 1218, 1301, 1365, 1456, 1586, 1720, 1821, 1901, 2010, 2160, 2312, 2427, 2521, 2650, 2824, 2996, 3123, 3227, 3374, 3574, 3770, 3911

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

Crossrefs

Sequence in context: A265049 A266333 A008225 * A008127 A008082 A008143

Adjacent sequences: A057310 A057311 A057312 * A057314 A057315 A057316

Keyword

nonn

Author

Ralf W. Grosse-Kunstleve

Status

approved