A019011 Cycle class sequence c(2n) (the number of true cycles of length 2n in which a certain node is included) for zeolite EAB = TMA-E (Aiello and Barrer)(1) (Me4N)2Na7[Al9Si27O7] starting with a T1 atom.

3, 7, 44, 197, 939, 5008, 31709, 215050, 1428402, 9455961, 63039275, 425182725, 2901153974, 20005580637, 139245680285

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: A253576 A354428 A328690 * A036842 A267844 A359046

Adjacent sequences: A019008 A019009 A019010 * A019012 A019013 A019014

Keyword

nonn,more

Author

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

Extensions

a(11)-a(16) from Sean A. Irvine, Mar 19 2019

Status

approved