A018998 - OEIS

A018998

Cycle class sequence c(2n) (the number of true cycles of length 2n in which a certain node is included) for zeolite CHA = Chabazite Ca6[ Al12Si24O72 ] . 40 H2O.

3, 7, 40, 180, 758, 4417, 29836, 200559, 1331295, 8723979, 57418006, 382550298, 2579719716, 17578920955, 120847481224

(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: A181081 A166895 A368627 * A018941 A018967 A018942

Adjacent sequences: A018995 A018996 A018997 * A018999 A019000 A019001

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