A018943 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 T3 atom.

3, 7, 40, 182, 744, 4348, 30316, 201606, 1325951, 8712942, 57420185, 382468132, 2579116980, 17576618010, 120833625953

Offset

2,1

Links

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

International Zeolite Association, 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: A018941 A018967 A018942 * A019024 A135071 A096219

Adjacent sequences: A018940 A018941 A018942 * A018944 A018945 A018946

Keyword

nonn,more

Author

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

Extensions

a(11)-a(16) from Sean A. Irvine, Feb 28 2019

Status

approved