A018970 Cycle class sequence c(2n) (the number of true cycles of length 2n in which a certain node is included) for zeolite AFX = SAPO-56 [Al23Si5P20O96] starting with a T2 atom.

3, 7, 41, 184, 801, 4749, 30806, 195875, 1262979, 8295251, 55547680, 376100279, 2557852318, 17464618397, 119881121776

Offset

2,1

Links

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

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: A058815 A333649 A089656 * A018968 A018969 A018971

Adjacent sequences: A018967 A018968 A018969 * A018971 A018972 A018973

Keyword

nonn,more

Author

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

Extensions

a(11)-a(16) from Sean A. Irvine, Mar 09 2019

Status

approved