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A019241
Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite STI = Stilbite Na4Ca8[ Al20Si52O144 ] . 56 H2O.
0
0, 2, 2, 10, 9, 16, 58, 98, 196, 445, 1107, 2566, 6245, 15883, 40199, 101196, 262535, 671260, 1729534, 4466241, 11504745, 29835299, 77256496, 200759467, 523172455, 1365186585, 3572926982, 9369651786, 24618108658
OFFSET
3,2
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
Sequence in context: A129898 A135996 A141610 * A168295 A309751 A249152
KEYWORD
nonn,more
AUTHOR
Georg Thimm (mgeorg(AT)ntu.edu.sg)
EXTENSIONS
a(20)-a(31) from Sean A. Irvine, Apr 18 2019
STATUS
approved