A018962 Cycle class sequence c(2n) (the number of true cycles of length 2n in which a certain node is included) for zeolite AFR = SAPO-40 [Si7Al29P28O128].4TPA.OH starting with a T3 atom.

3, 11, 41, 169, 978, 5369, 31352, 189377, 1176219, 7639579, 51289700, 349864063, 2402860362, 16545424606, 114072082438

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: A151087 A149066 A149067 * A102417 A358426 A096147

Adjacent sequences: A018959 A018960 A018961 * A018963 A018964 A018965

Keyword

nonn,more,changed

Author

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

Extensions

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

Status

approved