A018947 Cycle class sequence c(2n) (the number of true cycles of length 2n in which a certain node is included) for zeolite AET = AlPO4-8 [ Al36P36O144 ].

0, 11, 32, 285, 1349, 9222, 54014, 353731, 2251144, 14926216, 99321087, 674855955, 4635871503, 32311508644, 227740491756

Offset

2,2

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: A006655 A290640 A018956 * A038634 A062697 A247110

Adjacent sequences: A018944 A018945 A018946 * A018948 A018949 A018950

Keyword

nonn,more

Author

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

Extensions

a(11)-a(16) from Sean A. Irvine, Mar 02 2019

Status

approved