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A018984 Cycle class sequence c(2n) (the number of true cycles of length 2n in which a certain node is included) for zeolite ATO = AlPO4-31 [ Al18P18O72 ]. 0
1, 9, 48, 180, 1322, 6853, 43804, 283623, 1885015, 13026464, 90977470, 644191249, 4594696120, 32969721835, 237966662872 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,2

REFERENCES

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

LINKS

Table of n, a(n) for n=2..16.

G. Thimm, Cycle sequences of crystal structures

CROSSREFS

Sequence in context: A286437 A212107 A073979 * A055582 A054460 A115053

Adjacent sequences:  A018981 A018982 A018983 * A018985 A018986 A018987

KEYWORD

nonn,more

AUTHOR

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

EXTENSIONS

a(11)-a(16) from Sean A. Irvine, Mar 13 2019

STATUS

approved

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Last modified December 8 14:38 EST 2019. Contains 329865 sequences. (Running on oeis4.)