A018945 Cycle class sequence c(2n) (the number of true cycles of length 2n in which a certain node is included) for zeolite AEL = AlPO4-11 [ Al20P20O80 ].

1, 13, 23, 252, 1011, 7399, 41917, 288815, 1888898, 13146927, 91142757, 645483238, 4591598912, 32980554174, 238209736716

Offset

2,2

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: A089768 A300602 A185684 * A018958 A119410 A098927

Adjacent sequences: A018942 A018943 A018944 * A018946 A018947 A018948

Keyword

nonn

Author

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

Extensions

a(11)-a(16) from Sean A. Irvine, Mar 01 2019

Status

approved