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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
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 (list; graph; refs; listen; history; text; internal format)
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

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Last modified July 4 12:10 EDT 2022. Contains 355075 sequences. (Running on oeis4.)