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A018947
Cycle class sequence c(2n) (the number of true cycles of length 2n in which a certain node is included) for zeolite AET = AlPO4-8 [ Al36P36O144 ].
0
0, 11, 32, 285, 1349, 9222, 54014, 353731, 2251144, 14926216, 99321087, 674855955, 4635871503, 32311508644, 227740491756
OFFSET
2,2
LINKS
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: A006655 A290640 A018956 * A038634 A373047 A062697
KEYWORD
nonn,more
AUTHOR
Georg Thimm (mgeorg(AT)ntu.edu.sg)
EXTENSIONS
a(11)-a(16) from Sean A. Irvine, Mar 02 2019
STATUS
approved