A018959 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, 14, 32, 285, 1214, 8375, 47347, 313140, 2002655, 13551909, 92151432, 641986764, 4517340881, 32200934374, 231513936373

Offset

2,2

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: A031109 A155819 A120711 * A225420 A107484 A076329

Adjacent sequences: A018956 A018957 A018958 * A018960 A018961 A018962

Keyword

nonn,more

Author

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

Extensions

a(11)-a(16) from Sean A. Irvine, Mar 07 2019

Status

approved