A019138 - OEIS

A019138

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, 6, 12, 23, 26, 108, 196, 457, 1194, 2941, 6996, 18466, 44700, 115222, 290209, 743380, 1902091, 4927667, 12687155, 33111341, 86087218, 225487899, 590898052, 1554720401, 4094006743, 10817803375, 28602497093

(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: A363582 A068012 A261930 * A154324 A338218 A001630

Adjacent sequences: A019135 A019136 A019137 * A019139 A019140 A019141

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