Voozh

A018996

Cycle class sequence c(2n) (the number of true cycles of length 2n in which a certain node is included) for zeolite BPH = Beryllophosphate-H Na7K7[Be14P14O56].20H2O starting with a T2 atom.

3, 9, 52, 291, 1445, 6420, 32959, 187727, 1102665, 6930612, 46522650, 320194002, 2204132941, 15091491681, 102924219886

(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

Cf. A018966. [R. J. Mathar, Oct 26 2008]

Sequence in context: A319105 A106329 A193521 * A018966 A381938 A109933

Adjacent sequences: A018993 A018994 A018995 * A018997 A018998 A018999

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

URL: https://oeis.org/A018996

⇱ A018996 - OEIS