login
A018980
Cycle class sequence c(2n) (the number of true cycles of length 2n in which a certain node is included) for zeolite APD = AlPO4-D [ Al16P16O64 ].
0
2, 7, 25, 155, 1109, 6599, 41916, 268294, 1804922, 12288435, 84812079, 591842347, 4174903242, 29718998597, 213198431987
OFFSET
2,1
LINKS
Database of Zeolite Structures, Structure Commission of the International Zeolite Association, revised 2017.
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 [Subscription required].
CROSSREFS
Sequence in context: A358498 A339515 A323658 * A012990 A137102 A294681
KEYWORD
nonn,more
AUTHOR
Georg Thimm (mgeorg(AT)ntu.edu.sg)
EXTENSIONS
a(11)-a(16) from Sean A. Irvine, Mar 12 2019
STATUS
approved