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A019017
Cycle class sequence c(2n) (the number of true cycles of length 2n in which a certain node is included) for zeolite GIS = Cycle class sequences of Gismondine Ca4 [ Al8Si8O32 ] . 16 H2O.
0
3, 6, 20, 120, 942, 6090, 35264, 211482, 1379880, 9243828, 61999620, 418306954, 2855363476, 19702480170, 137045990064
OFFSET
2,1
REFERENCES
G. Thimm and W. E. Klee, Zeolite cycle sequences, Zeolites, 19, pp. 422-424, 1997.
CROSSREFS
Sequence in context: A194992 A163881 A238474 * A019049 A019057 A019058
KEYWORD
nonn,more
AUTHOR
Georg Thimm (mgeorg(AT)ntu.edu.sg)
EXTENSIONS
a(11)-a(16) from Sean A. Irvine, Mar 21 2019
STATUS
approved