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A008121 Coordination sequence T1 for Zeolite Code JBW. 0
1, 4, 10, 21, 39, 61, 81, 107, 148, 192, 228, 266, 324, 393, 449, 503, 575, 659, 738, 814, 906, 1002, 1090, 1191, 1311, 1427, 1521, 1629, 1780, 1926, 2036, 2148, 2308, 2487, 2625, 2753, 2919, 3105, 3274, 3432, 3618, 3808, 3978, 4169, 4391, 4601, 4769, 4959 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

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

R. W. Grosse-Kunstleve, Coordination Sequences and Encyclopedia of Integer Sequences

International Zeolite Association, Database of Zeolite Structures

FORMULA

Empirical g.f.: (1 +x)*(1 -x +x^2)*(1 +3*x +8*x^2 +16*x^3 +28*x^4 +37*x^5 +40*x^6 +37*x^7 +28*x^8 +16*x^9 +8*x^10 +3*x^11 +x^12) / ((1 -x)^3*(1 +x^2)^2*(1 +x +x^2 +x^3 +x^4)^2). - Colin Barker, Dec 18 2015

CROSSREFS

Sequence in context: A009886 A008075 A009898 * A253687 A253688 A049480

Adjacent sequences:  A008118 A008119 A008120 * A008122 A008123 A008124

KEYWORD

nonn

AUTHOR

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

STATUS

approved

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Last modified February 24 06:13 EST 2018. Contains 299597 sequences. (Running on oeis4.)