A263627 - OEIS

%I #6 Oct 25 2015 05:35:31

%S 0,0,0,0,0,1,2,8,33,306,6727,219754

%N Number of Seidel matrices of order n with minimal eigenvalue -5.

%H G. Greaves, J. H. Koolen, A. Munemasa, F. Szöllősi, <a href="http://arxiv.org/abs/1403.2155">Equiangular lines in Euclidean spaces</a>, arXiv:1403.2155 [math.CO], 2014.

%K nonn,more

%O 1,7

%A _N. J. A. Sloane_, Oct 24 2015