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A018992 Cycle class sequence c(2n) (the number of true cycles of length 2n in which a certain node is included) for zeolite AWW = AlPO4-22 [ Al24P24O96 ] . 2 R. 0
2, 4, 39, 208, 981, 5909, 37421, 241885, 1610770, 10829938, 73483649, 503899769, 3486438851, 24325367528, 171075635301 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,1

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: A009835 A009834 A106127 * A098625 A057777 A139735

Adjacent sequences:  A018989 A018990 A018991 * A018993 A018994 A018995

KEYWORD

nonn,more

AUTHOR

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

EXTENSIONS

a(11)-a(16) from Sean A. Irvine, Mar 17 2019

STATUS

approved

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Last modified September 18 23:45 EDT 2021. Contains 347549 sequences. (Running on oeis4.)