A019137 - OEIS

A019137

Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite HEU = Heulandite Ca4 [ Al8Si28O72 ] . 24 H2O.

0, 2, 3, 4, 14, 22, 27, 111, 203, 459, 1247, 2908, 7150, 18683, 45204, 115959, 294132, 747914, 1921874, 4963203, 12803348, 33373848, 86878679, 227387373, 596390318, 1568366108, 4131699364, 10914084820, 28862535866

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

OFFSET

3,2

REFERENCES

G. Thimm and W. E. Klee, Zeolite cycle sequences, Zeolites, 19, pp. 422-424, 1997.

LINKS

Table of n, a(n) for n=3..31.

G. Thimm, Cycle sequences of crystal structures

CROSSREFS

Sequence in context: A127283 A047193 A333622 * A333623 A317737 A188533

Adjacent sequences: A019134 A019135 A019136 * A019138 A019139 A019140

KEYWORD

nonn,more

AUTHOR

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

EXTENSIONS

a(20)-a(31) from Sean A. Irvine, Apr 08 2019

STATUS

approved