A018955 Cycle class sequence c(2n) (the number of true cycles of length 2n in which a certain node is included) for zeolite AFI = AlPO4-5 [ Al12P12O48 ] . R . q H2O.

1, 13, 28, 270, 1176, 7952, 43772, 285525, 1808560, 12186394, 82828916, 578556693, 4088706356, 29246505510, 210592755064

Offset

2,2

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: A281476 A001291 A018974 * A240819 A293661 A087593

Adjacent sequences: A018952 A018953 A018954 * A018956 A018957 A018958

Keyword

nonn,more

Author

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

Extensions

a(11)-a(16) from Sean A. Irvine, Mar 04 2019

Status

approved