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A019062 Cycle class sequence c(2n) (the number of true cycles of length 2n in which a certain node is included) for zeolite THO = Thomsonite Na4Ca8[ Al20Si20O80 ] . 24 H2O. 1
4, 4, 16, 160, 852, 4732, 30184, 189504, 1205100, 7852660, 51742748, 345148988, 2326869772, 15824127132, 108475211920 (list; graph; refs; listen; history; text; internal format)
OFFSET
2,1
LINKS
Database of Zeolite Structures, Structure Commission of 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
Cf. A019013 (agrees until a(10), thereafter differs).
Sequence in context: A091541 A094354 A263389 * A019013 A340425 A165422
KEYWORD
nonn,more
AUTHOR
Georg Thimm (mgeorg(AT)ntu.edu.sg)
EXTENSIONS
a(11)-a(16) from Sean A. Irvine, Mar 31 2019
STATUS
approved

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Last modified September 21 08:22 EDT 2023. Contains 365498 sequences. (Running on oeis4.)