A018958 Cycle class sequence c(2n) (the number of true cycles of length 2n in which a certain node is included) for zeolite AFO = AlPO4-41 [ Al20P20O80 ].

1, 13, 23, 255, 1076, 7925, 45657, 309062, 2001564, 13669028, 93416132, 652814448, 4601924385, 32846238368, 236373208105

Offset

2,2

Links

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

G. Thimm, Cycle sequences of crystal structures.

G. Thimm, Personal website (archived).

G. Thimm and W. E. Klee, Zeolite cycle sequences, Zeolites, 19(5-6) (1997), 422-424.

Georg Thimm, A graph theoretical approach to the analysis, comparison, and enumeration of crystal structures, Dissertation, Goethe University Frankfurt, Germany, 2008.

Crossrefs

Sequence in context: A300602 A185684 A018945 * A119410 A098927 A133785

Adjacent sequences: A018955 A018956 A018957 * A018959 A018960 A018961

Keyword

nonn,more

Author

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

Extensions

a(11)-a(16) from Sean A. Irvine, Mar 06 2019

Status

approved