A018992 Cycle class sequence c(2n) (the number of true cycles of length 2n in which a certain node is included) for zeolite AWW = AlPO4-22 [Al24P24O96].2R starting with a T1 atom.

2, 4, 39, 208, 981, 5909, 37421, 241885, 1610770, 10829938, 73483649, 503899769, 3486438851, 24325367528, 171075635301

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: A362411 A009834 A106127 * A098625 A057777 A139735

Adjacent sequences: A018989 A018990 A018991 * A018993 A018994 A018995

Keyword

nonn,more,changed

Author

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

Extensions

a(11)-a(16) from Sean A. Irvine, Mar 17 2019

Status

approved