A018953 - OEIS

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A018953

Cycle class sequence c(2n) (the number of true cycles of length 2n in which a certain node is included) for zeolite AFG = Afghanite (Na2,Ca,K2)12 [ Al24Si24O96 ].

2, 6, 34, 217, 1092, 6616, 39640, 254593, 1678272, 11264666, 77021822, 533716317, 3728816166, 26255378070, 186191393010

(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: A279609 A253778 A346189 * A009199 A052824 A371768

Adjacent sequences: A018950 A018951 A018952 * A018954 A018955 A018956

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