A018994 Cycle class sequence c(2n) (the number of true cycles of length 2n in which a certain node is included) for zeolite BPH = Beryllophosphate-H Na7K7 [ Be14P14O56 ] . 20 H2O.

3, 6, 24, 189, 1050, 5130, 29586, 183822, 1132146, 7238454, 48779613, 335824479, 2318832312, 15998100231, 110190414096

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: A081072 A000717 A076020 * A018964 A304186 A288760

Adjacent sequences: A018991 A018992 A018993 * A018995 A018996 A018997

Keyword

nonn,more

Author

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

Extensions

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

Status

approved