A057312 Coordination sequence T1 for Zeolite Code SAS.

1, 4, 10, 19, 30, 45, 65, 90, 118, 145, 175, 212, 257, 306, 350, 394, 446, 510, 581, 644, 703, 769, 850, 942, 1025, 1101, 1182, 1279, 1390, 1492, 1586, 1684, 1798, 1927, 2046, 2157, 2273, 2406, 2554, 2689, 2815, 2948, 3101, 3270, 3422, 3562, 3710

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) * (1 + x + 2*x^2 + 2*x^3 + 3*x^4 + 4*x^5 + 3*x^6 + 2*x^7 + 2*x^8 + x^9 + x^10) / ((1 - x)^3 * (1 - x + x^2) * (1 + x + x^2 + x^3 + x^4)^2). - Colin Barker, Dec 19 2015

Crossrefs

Sequence in context: A238705 A022785 A241239 * A219965 A008038 A301248

Adjacent sequences: A057309 A057310 A057311 * A057313 A057314 A057315

Keyword

nonn

Author

Ralf W. Grosse-Kunstleve

Status

approved