A019238 Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite SGT = Sigma-2 [ Si64O128 ] . 4 R.

0, 1, 4, 1, 12, 34, 48, 96, 252, 606, 1288, 3134, 8270, 19542, 48694, 129742, 332080, 854110, 2249258, 5877476, 15356834, 40458364, 106629524, 281136526, 743677614, 1971538978, 5234641970, 13926363260, 37124297350

Offset

3,3

Links

Table of n, a(n) for n=3..31.

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: A089503 A019236 A019237 * A299523 A157404 A135704

Adjacent sequences: A019235 A019236 A019237 * A019239 A019240 A019241

Keyword

nonn,more

Author

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

Extensions

a(20)-a(31) from Sean A. Irvine, Apr 18 2019

Status

approved