login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A019221 Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite RSN = RUB-17 K4Na12 [ Zn8Si28O72 ] . 18 H2O. 0
1, 1, 1, 0, 0, 8, 24, 90, 240, 492, 1064, 2452, 5814, 14766, 38400, 98846, 252902, 644456, 1641944, 4201380, 10802792, 27907392, 72395562, 188325960, 491013312, 1283101256, 3359669780, 8813687070, 23166783438 (list; graph; refs; listen; history; text; internal format)
OFFSET

3,6

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: A279162 A217016 A019260 * A334756 A281463 A267326

Adjacent sequences:  A019218 A019219 A019220 * A019222 A019223 A019224

KEYWORD

nonn,more

AUTHOR

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

EXTENSIONS

a(21)-a(31) from Sean A. Irvine, Apr 17 2019

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified October 15 18:54 EDT 2021. Contains 348034 sequences. (Running on oeis4.)