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A018955
Cycle class sequence c(2n) (the number of true cycles of length 2n in which a certain node is included) for zeolite AFI = AlPO4-5 [ Al12P12O48 ] . R . q H2O.
0
1, 13, 28, 270, 1176, 7952, 43772, 285525, 1808560, 12186394, 82828916, 578556693, 4088706356, 29246505510, 210592755064
OFFSET
2,2
REFERENCES
G. Thimm and W. E. Klee, Zeolite cycle sequences, Zeolites, 19, pp. 422-424, 1997.
CROSSREFS
Sequence in context: A281476 A001291 A018974 * A240819 A293661 A087593
KEYWORD
nonn,more
AUTHOR
Georg Thimm (mgeorg(AT)ntu.edu.sg)
EXTENSIONS
a(11)-a(16) from Sean A. Irvine, Mar 04 2019
STATUS
approved