A018963 Cycle class sequence c(2n) (the number of true cycles of length 2n in which a certain node is included) for zeolite AFR = SAPO-40 [ Si7Al29P28O128 ] . 4 TPA . OH.

3, 11, 44, 190, 1084, 5876, 33127, 195616, 1195351, 7647210, 50776030, 344459677, 2363407119, 16295430670, 112573797968

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: A293468 A151108 A256752 * A217886 A234627 A030815

Adjacent sequences: A018960 A018961 A018962 * A018964 A018965 A018966

Keyword

nonn,more

Author

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

Extensions

a(11)-a(16) from Sean A. Irvine, Mar 07 2019

Status

approved