A019062 - OEIS

A019062

Cycle class sequence c(2n) (the number of true cycles of length 2n in which a certain node is included) for zeolite THO = Thomsonite Na4Ca8[ Al20Si20O80 ] . 24 H2O.

4, 4, 16, 160, 852, 4732, 30184, 189504, 1205100, 7852660, 51742748, 345148988, 2326869772, 15824127132, 108475211920

(list; graph; refs; listen; history; text; internal format)

OFFSET

2,1

LINKS

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

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. A019013 (agrees until a(10), thereafter differs).

Sequence in context: A091541 A094354 A263389 * A019013 A340425 A165422

Adjacent sequences: A019059 A019060 A019061 * A019063 A019064 A019065

KEYWORD

nonn,more

AUTHOR

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

EXTENSIONS

a(11)-a(16) from Sean A. Irvine, Mar 31 2019

STATUS

approved