login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A004032 Number of n-dimensional crystal families.
(Formerly M3289)
1
1, 1, 4, 6, 23, 32, 91 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,3
REFERENCES
H. Brown, R. Bülow, J. Neubüser, H. Wondratschek and H. Zassenhaus, Crystallographic Groups of Four-Dimensional Space. Wiley, NY, 1978, p. 52.
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
LINKS
W. Plesken and T. Schulz, Counting crystallographic groups in low dimensions, Experimental Mathematics, Volume 9 Issue 3 (2000), 321-478
Wikipedia, Space_group
CROSSREFS
Sequence in context: A061597 A075813 A107952 * A123046 A237748 A359863
KEYWORD
hard,nonn,nice
AUTHOR
EXTENSIONS
a(5)-a(6) from Henry Bottomley, Feb 03 2014
STATUS
approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified July 20 15:01 EDT 2024. Contains 374459 sequences. (Running on oeis4.)