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A018946 Cycle class sequence c(2n) (the number of true cycles of length 2n in which a certain node is included) for zeolite AEL = AlPO4-11 [ Al20P20O80 ]. 0
1, 13, 27, 250, 1027, 7325, 41828, 286471, 1880024, 13073044, 90717167, 642317301, 4569527100, 32812863245, 236942593847 (list; graph; refs; listen; history; text; internal format)
OFFSET
2,2
LINKS
Table of n, a(n) for n=2..16.
Database of Zeolite Structures, Structure Commission of the International Zeolite Association, revised 2017.
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: A041334 A146380 A146372 * A042397 A041336 A145417
Adjacent sequences: A018943 A018944 A018945 * A018947 A018948 A018949
KEYWORD
nonn
AUTHOR
Georg Thimm (mgeorg(AT)ntu.edu.sg)
EXTENSIONS
a(11)-a(16) from Sean A. Irvine, Mar 01 2019
STATUS
approved

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Last modified August 29 15:03 EDT 2024. Contains 375517 sequences. (Running on oeis4.)