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A018998
Cycle class sequence c(2n) (the number of true cycles of length 2n in which a certain node is included) for zeolite CHA = Chabazite Ca6[ Al12Si24O72 ] . 40 H2O.
0
3, 7, 40, 180, 758, 4417, 29836, 200559, 1331295, 8723979, 57418006, 382550298, 2579719716, 17578920955, 120847481224
OFFSET
2,1
REFERENCES
G. Thimm and W. E. Klee, Zeolite cycle sequences, Zeolites, 19, pp. 422-424, 1997.
CROSSREFS
Sequence in context: A181081 A166895 A368627 * A018941 A018967 A018942
KEYWORD
nonn,more
AUTHOR
Georg Thimm (mgeorg(AT)ntu.edu.sg)
EXTENSIONS
a(11)-a(16) from Sean A. Irvine, Mar 17 2019
STATUS
approved