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A018940 Cycle class sequence c(2n) (the number of true cycles of length 2n in which a certain node is included) for zeolite ABW = Li-A (Barrer and White). 1
2, 6, 32, 170, 1038, 6419, 39528, 260163, 1718940, 11576741, 79305984, 549330964, 3845685592, 27164175570, 193374857264 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,1

LINKS

Table of n, a(n) for n=2..16.

International Zeolite Association, Database of Zeolite Structures, Structure Commissionof the International Zeolite Association, revised 2017.

Sean A. Irvine, Java program (github).

Georg Thimm, Cycle sequences of crystal structures.

Georg Thimm, Personal website (archived).

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

Sequence in context: A121071 A092199 A108485 * A271958 A055596 A318976

Adjacent sequences:  A018937 A018938 A018939 * A018941 A018942 A018943

KEYWORD

nonn

AUTHOR

Georg Thimm (mgeorg(AT)ntu.edu.sg)

EXTENSIONS

a(11)-a(16) from Sean A. Irvine, Feb 27 2019

STATUS

approved

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Last modified August 3 17:03 EDT 2021. Contains 346439 sequences. (Running on oeis4.)