A018960 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 ] . 4 TPA . OH.

2, 9, 43, 185, 1068, 5908, 33711, 201908, 1252537, 8093382, 54041010, 367349280, 2519993244, 17358556116, 119812418022

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: A132847 A275620 A121365 * A217666 A002310 A309986

Adjacent sequences: A018957 A018958 A018959 * A018961 A018962 A018963

Keyword

nonn,more

Author

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

Extensions

a(11)-a(16) from Sean A. Irvine, Mar 06 2019

Status

approved