A018961 - OEIS

A018961

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.

3, 11, 38, 171, 1016, 5660, 32322, 191194, 1184443, 7663094, 51297396, 349410472, 2398302135, 16510574038, 113831981156

(list; graph; refs; listen; history; text; internal format)

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: A151468 A289989 A295263 * A178624 A027528 A192528

Adjacent sequences: A018958 A018959 A018960 * A018962 A018963 A018964

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