A018942 Cycle class sequence c(2n) (the number of true cycles of length 2n in which a certain node is included) for zeolite AEI = AlPO4-18 [Al24P24O96] starting with a T2 atom.

3, 7, 40, 182, 743, 4352, 30332, 201543, 1325921, 8713574, 57424581, 382475483, 2579060723, 17576553677, 120836055479

Offset

2,1

Links

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

Database of Zeolite Structures, Structure Commission of 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

Sequence in context: A018998 A018941 A018967 * A018943 A019024 A135071

Adjacent sequences: A018939 A018940 A018941 * A018943 A018944 A018945

Keyword

nonn,more

Author

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

Extensions

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

Status

approved