A086261 - OEIS

%I #9 Oct 09 2021 02:05:32

%S 1,2,0,16,0,0,0,30720,0,0,0,1486356480,0

%N Number of antisymmetric n X n conference matrices.

%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/C-Matrix.html">C-Matrix</a>

%Y Cf. A086260, A086262.

%K nonn,more

%O 1,2

%A _Eric W. Weisstein_, Jul 14 2003

%E a(9)-a(13) from _Martin Ehrenstein_, Oct 07 2021