A018957 - OEIS

A018957

Cycle class sequence c(2n) (the number of true cycles of length 2n in which a certain node is included) for zeolite AFO = AlPO4-41 [Al20P20O80] starting with a T3 atom.

1, 12, 18, 213, 868, 6811, 40267, 283800, 1893581, 13245343, 92117860, 651848468, 4635906047, 33287875110, 240521004903

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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: A231094 A258427 A166627 * A238922 A212128 A110932

Adjacent sequences: A018954 A018955 A018956 * A018958 A018959 A018960

KEYWORD

nonn,more

AUTHOR

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

EXTENSIONS

a(11)-a(16) from Sean A. Irvine, Mar 07 2019

STATUS

approved