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A018974
Cycle class sequence c(2n) (the number of true cycles of length 2n in which a certain node is included) for zeolite AHT = AlPO4-H2 [ Al6P6O12 ] . 8H2 O.
0
1, 13, 28, 215, 902, 6262, 37975, 261155, 1720431, 11704764, 79439672, 548760055, 3820066453, 26878448816, 190482853291
OFFSET
2,2
REFERENCES
G. Thimm and W. E. Klee, Zeolite cycle sequences, Zeolites, 19, pp. 422-424, 1997.
CROSSREFS
Sequence in context: A026054 A281476 A001291 * A018955 A240819 A293661
KEYWORD
nonn,more
AUTHOR
Georg Thimm (mgeorg(AT)ntu.edu.sg)
EXTENSIONS
a(11)-a(16) from Sean A. Irvine, Mar 11 2019
STATUS
approved