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 ] . 20 H2O.

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

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 A109933 A018477

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