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A086260 Number of symmetric n X n conference matrices. 2


%S 1,2,0,0,0,384,0,0,0,2580480,0,0,0

%N Number of symmetric 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. A086261, 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

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Last modified October 4 06:54 EDT 2022. Contains 357237 sequences. (Running on oeis4.)