A018941 Cycle class sequence c(2n) (the number of true cycles of length 2n in which a certain node is included) for zeolite AEI = AlPO4-18 [ Al24P24O96 ].

3, 7, 40, 181, 751, 4362, 30172, 201561, 1326983, 8712861, 57417550, 382491765, 2579276497, 17577174628, 120836343848

Offset

2,1

Links

Table of n, a(n) for n=2..16.

Georg Thimm, Cycle sequences of crystal structures.

Georg Thimm, Personal website (archived).

Georg Thimm, A graph theoretical approach to the analysis, comparison, and enumeration of crystal structures, Dissertation, Goethe University Frankfurt, Germany, 2008.

Georg Thimm and W. E. Klee, Zeolite cycle sequences, Zeolites, 19(5-6) (1997), 422-424.

Crossrefs

Sequence in context: A166895 A368627 A018998 * A018967 A018942 A018943

Adjacent sequences: A018938 A018939 A018940 * A018942 A018943 A018944

Keyword

nonn,more

Author

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

Extensions

a(11)-a(16) from Sean A. Irvine, Feb 28 2019

Status

approved