A018940 Cycle class sequence c(2n) (the number of true cycles of length 2n in which a certain node is included) for zeolite ABW = Li-A (Barrer and White).

2, 6, 32, 170, 1038, 6419, 39528, 260163, 1718940, 11576741, 79305984, 549330964, 3845685592, 27164175570, 193374857264

Offset

2,1

Links

Table of n, a(n) for n=2..16.

International Zeolite Association, Database of Zeolite Structures, Structure Commissionof the International Zeolite Association, revised 2017.

Sean A. Irvine, Java program (github).

Georg Thimm, Cycle sequences of crystal structures.

Georg Thimm, Personal website (archived).

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: A092199 A108485 A371482 * A271958 A354662 A055596

Adjacent sequences: A018937 A018938 A018939 * A018941 A018942 A018943

Keyword

nonn

Author

Georg Thimm (mgeorg(AT)ntu.edu.sg)

Extensions

a(11)-a(16) from Sean A. Irvine, Feb 27 2019

Status

approved