The OEIS mourns the passing of
Jim Simons
and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A263624
Number of Seidel matrices of order n with exactly three distinct eigenvalues, up to switching equivalence.
0
0, 0, 1, 2, 0, 2, 3, 4, 0, 10
(
list
;
graph
;
refs
;
listen
;
history
;
text
;
internal format
)
OFFSET
3,4
LINKS
Table of n, a(n) for n=3..12.
G. Greaves, J. H. Koolen, A. Munemasa, F. Szöllősi,
Equiangular lines in Euclidean spaces
, arXiv:1403.2155 [math.CO], 2014.
CROSSREFS
Sequence in context:
A245230
A284268
A063180
*
A141693
A279679
A261096
Adjacent sequences:
A263621
A263622
A263623
*
A263625
A263626
A263627
KEYWORD
nonn
,
more
AUTHOR
N. J. A. Sloane
, Oct 24 2015
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 May 15 07:58 EDT 2024. Contains 372538 sequences. (Running on oeis4.)
