A018965 Cycle class sequence c(2n) (the number of true cycles of length 2n in which a certain node is included) for zeolite AFS = MAPSO-46.

3, 9, 42, 236, 1280, 6087, 32623, 190235, 1136383, 7203562, 48328561, 330930887, 2266788855, 15475721412, 105439291827

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.

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

Same beginning as A018995, but may disagree later.

Sequence in context: A001427 A020128 A018995 * A357703 A105804 A009402

Adjacent sequences: A018962 A018963 A018964 * A018966 A018967 A018968

Keyword

nonn,more

Author

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

Extensions

a(11)-a(16) from Sean A. Irvine, Mar 08 2019

Status

approved