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A019239
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Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite STI = Stilbite Na4Ca8[ Al20Si52O144 ] . 56 H2O.
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0
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0, 0, 4, 2, 12, 12, 64, 72, 220, 456, 1244, 2830, 7188, 17856, 45804, 113488, 295004, 747248, 1915456, 4932504, 12680644, 32787732, 84992148, 220635798, 575619804, 1502902660, 3936971432, 10334337920, 27175444212
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OFFSET
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3,3
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REFERENCES
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G. Thimm and W. E. Klee, Zeolite cycle sequences, Zeolites, 19, pp. 422-424, 1997.
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LINKS
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Table of n, a(n) for n=3..31.
G. Thimm, Cycle sequences of crystal structures
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CROSSREFS
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Sequence in context: A143376 A111667 A323825 * A143944 A154345 A058095
Adjacent sequences: A019236 A019237 A019238 * A019240 A019241 A019242
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KEYWORD
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nonn,more
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AUTHOR
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Georg Thimm (mgeorg(AT)ntu.edu.sg)
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EXTENSIONS
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a(20)-a(31) from Sean A. Irvine, Apr 18 2019
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STATUS
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approved
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