A019013 Cycle class sequence c(2n) (the number of true cycles of length 2n in which a certain node is included) for zeolite EDI = Edingtonite Ba2[Al4Si6O20].8H2O starting with a T2 atom.

4, 4, 16, 160, 852, 4732, 30184, 189504, 1205100, 7852748, 51742664, 345137460, 2326824304, 15824261632, 108475583464

Offset

2,1

Links

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

International Zeolite Association, Database of Zeolite Structures, Structure Commission of the International Zeolite Association, revised 2017.

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

Cf. A019062 (agrees until a(10), thereafter differs).

Sequence in context: A094354 A263389 A019062 * A340425 A165422 A051460

Adjacent sequences: A019010 A019011 A019012 * A019014 A019015 A019016

Keyword

nonn,more,changed

Author

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

Extensions

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

Status

approved