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A016430 Coordination sequence T1 for Zeolite Code OSI. 1
1, 4, 10, 21, 37, 57, 82, 111, 145, 189, 236, 280, 332, 392, 454, 525, 599, 671, 754, 841, 927, 1029, 1134, 1230, 1340, 1458, 1572, 1701, 1833, 1957, 2098, 2243, 2381, 2541, 2704, 2852, 3020, 3196, 3362, 3549, 3739, 3915, 4114, 4317, 4507, 4725, 4946 (list; graph; refs; listen; history; text; internal format)
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+4*x^2+4*x^3+7*x^4+6*x^5+7*x^6+4*x^7+6*x^8+3*x^9+x^10-2*x^12) / ((1-x)^3 * (1-x+x^2) * (1+x^2) * (1+x+x^2)^2). - Colin Barker, Dec 19 2015

CROSSREFS

Sequence in context: A301014 A301009 A008260 * A008034 A008134 A009897

Adjacent sequences:  A016427 A016428 A016429 * A016431 A016432 A016433

KEYWORD

nonn

AUTHOR

Ralf W. Grosse-Kunstleve

STATUS

approved

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Last modified September 28 19:16 EDT 2021. Contains 347717 sequences. (Running on oeis4.)