A018948 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 ].

1, 13, 24, 275, 1194, 8899, 51733, 347529, 2210618, 14721789, 97702254, 662622660, 4535444099, 31505110446, 221249438258

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: A053080 A014357 A018991 * A256475 A335374 A335466

Adjacent sequences: A018945 A018946 A018947 * A018949 A018950 A018951

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