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A018955 Cycle class sequence c(2n) (the number of true cycles of length 2n in which a certain node is included) for zeolite AFI = AlPO4-5 [ Al12P12O48 ] . R . q H2O. 0
1, 13, 28, 270, 1176, 7952, 43772, 285525, 1808560, 12186394, 82828916, 578556693, 4088706356, 29246505510, 210592755064 (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: A281476 A001291 A018974 * A240819 A293661 A087593

Adjacent sequences:  A018952 A018953 A018954 * A018956 A018957 A018958

KEYWORD

nonn,more

AUTHOR

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

EXTENSIONS

a(11)-a(16) from Sean A. Irvine, Mar 04 2019

STATUS

approved

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Last modified January 18 06:47 EST 2022. Contains 350452 sequences. (Running on oeis4.)