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A019087 Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite BRE = Brewsterite (Sr,Ba)2 [ Al4Si12O32 ] . 10 H2O. 0
0, 2, 2, 7, 8, 21, 31, 91, 180, 554, 1089, 3213, 6964, 19472, 44811, 121353, 291654, 784152, 1935599, 5174638, 13101147, 34852054, 89615140, 238340564, 618916852, 1646032524, 4310429063, 11469565103 (list; graph; refs; listen; history; text; internal format)
OFFSET

3,2

REFERENCES

G. Thimm and W. E. Klee, Zeolite cycle sequences, Zeolites, 19, pp. 422-424, 1997.

LINKS

Table of n, a(n) for n=3..30.

G. Thimm, Cycle sequences of crystal structures

CROSSREFS

Sequence in context: A199467 A168160 A005300 * A293607 A026563 A062305

Adjacent sequences:  A019084 A019085 A019086 * A019088 A019089 A019090

KEYWORD

nonn,more

AUTHOR

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

EXTENSIONS

a(21)-a(30) from Sean A. Irvine, Apr 03 2019

STATUS

approved

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Last modified May 15 14:31 EDT 2021. Contains 343920 sequences. (Running on oeis4.)