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A018995 Cycle class sequence c(2n) (the number of true cycles of length 2n in which a certain node is included) for zeolite BPH = Beryllophosphate-H Na7K7 [ Be14P14O56 ] . 20 H2O. 1
3, 9, 42, 236, 1280, 6087, 32623, 190235, 1136383, 7203562, 48328561, 330930887, 2266788757, 15475719147, 105439268002 (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 A018965, but may disagree later.
Cf. A018965. [R. J. Mathar, Oct 26 2008]
Sequence in context: A264521 A001427 A020128 * A018965 A357703 A105804
KEYWORD
nonn,more
AUTHOR
Georg Thimm (mgeorg(AT)ntu.edu.sg)
EXTENSIONS
a(11)-a(16) from Sean A. Irvine, Mar 17 2019
STATUS
approved

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Last modified July 15 11:27 EDT 2024. Contains 374332 sequences. (Running on oeis4.)