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A018974 Cycle class sequence c(2n) (the number of true cycles of length 2n in which a certain node is included) for zeolite AHT = AlPO4-H2 [ Al6P6O12 ] . 8H2 O. 0
1, 13, 28, 215, 902, 6262, 37975, 261155, 1720431, 11704764, 79439672, 548760055, 3820066453, 26878448816, 190482853291 (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: A026054 A281476 A001291 * A018955 A240819 A293661

Adjacent sequences:  A018971 A018972 A018973 * A018975 A018976 A018977

KEYWORD

nonn,more

AUTHOR

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

EXTENSIONS

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

STATUS

approved

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Last modified May 20 07:22 EDT 2022. Contains 353852 sequences. (Running on oeis4.)