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A263627
Number of Seidel matrices of order n with minimal eigenvalue -5.
0
0, 0, 0, 0, 0, 1, 2, 8, 33, 306, 6727, 219754
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OFFSET
1,7
LINKS
Table of n, a(n) for n=1..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:
A269890
A005040
A191551
*
A172448
A268601
A026577
Adjacent sequences:
A263624
A263625
A263626
*
A263628
A263629
A263630
KEYWORD
nonn
,
more
AUTHOR
N. J. A. Sloane
, Oct 24 2015
STATUS
approved
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Last modified August 24 02:14 EDT 2024. Contains 375396 sequences. (Running on oeis4.)