A019085 Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite BRE = Brewsterite (Sr,Ba)2 [ Al4Si12O32 ] . 10 H2O.

0, 1, 4, 4, 12, 21, 36, 81, 215, 498, 1230, 3024, 7518, 18716, 47494, 119818, 305638, 781495, 2015124, 5200150, 13532475, 35199561, 92135477, 241342171, 634477759, 1670301161, 4410053106, 11656356800, 30891424869

Offset

3,3

References

G. Thimm and W. E. Klee, Zeolite cycle sequences, Zeolites, 19 (1997), pp. 422-424.

Links

Table of n, a(n) for n=3..31.

G. Thimm, Cycle sequences of crystal structures

Crossrefs

Sequence in context: A309128 A120033 A097073 * A303644 A298796 A106232

Adjacent sequences: A019082 A019083 A019084 * A019086 A019087 A019088

Keyword

nonn,more

Author

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

Extensions

a(20)-a(31) from Sean A. Irvine, Apr 03 2019

Status

approved