A018997 - OEIS

A018997

Cycle class sequence c(2n) (the number of true cycles of length 2n in which a certain node is included) for zeolite CAN = Cancrinite Na6[ Al6Si6O24 ] . CaCO3 . 2 H2O.

2, 7, 36, 230, 1104, 6657, 38976, 247431, 1617560, 10806202, 73706144, 510591393, 3568689922, 25130781435, 178056349424

(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: A371545 A370471 A177258 * A018954 A019030 A212411

Adjacent sequences: A018994 A018995 A018996 * A018998 A018999 A019000

KEYWORD

nonn,more

AUTHOR

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

EXTENSIONS

a(11)-a(16) from Sean A. Irvine, Mar 19 2019

STATUS

approved