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].8H2O starting from a T1 atom.

1, 13, 28, 215, 902, 6262, 37975, 261155, 1720431, 11704764, 79439672, 548760055, 3820066453, 26878448816, 190482853291

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