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A018965 Cycle class sequence c(2n) (the number of true cycles of length 2n in which a certain node is included) for zeolite AFS = MAPSO-46. 1
3, 9, 42, 236, 1280, 6087, 32623, 190235, 1136383, 7203562, 48328561, 330930887, 2266788855, 15475721412, 105439291827 (list; graph; refs; listen; history; text; internal format)
OFFSET
2,1
LINKS
International Zeolite Association, Database of Zeolite Structures, Structure Commissionof the International Zeolite Association, revised 2017.
Georg Thimm, A graph theoretical approach to the analysis, comparison, and enumeration of crystal structures, Dissertation, Goethe University Frankfurt, Germany, 2008.
Georg Thimm and W. E. Klee, Zeolite cycle sequences, Zeolites, 19(5-6) (1997), 422-424.
CROSSREFS
Same beginning as A018995, but may disagree later.
Sequence in context: A001427 A020128 A018995 * A357703 A105804 A009402
KEYWORD
nonn,more
AUTHOR
Georg Thimm (mgeorg(AT)ntu.edu.sg)
EXTENSIONS
a(11)-a(16) from Sean A. Irvine, Mar 08 2019
STATUS
approved

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Last modified July 19 00:30 EDT 2024. Contains 374388 sequences. (Running on oeis4.)