A301137 Coordination sequence T1 for Zeolite Code NAB.

1, 4, 9, 19, 40, 55, 80, 115, 138, 183, 229, 260, 328, 382, 421, 515, 574, 621, 744, 805, 860, 1015, 1075, 1138, 1328, 1384, 1455, 1683, 1732, 1811, 2080, 2119, 2206, 2519, 2545, 2640, 3000, 3010, 3113, 3523, 3514, 3625, 4088, 4057, 4176, 4695, 4639

Offset

0,2

Links

R. W. Grosse-Kunstleve, Table of n, a(n) for n = 0..1000

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 + 4*x + 9*x^2 + 16*x^3 + 28*x^4 + 28*x^5 + 26*x^6 + 7*x^7 - x^9 + 2*x^11) / (1 - x^3)^3.

Crossrefs

Sequence in context: A052549 A153894 A372448 * A214318 A300438 A034479

Adjacent sequences: A301134 A301135 A301136 * A301138 A301139 A301140

Keyword

nonn

Author

Sean A. Irvine, Mar 18 2018

Status

approved