%I #8 Mar 30 2012 16:45:17
%S 2,22,394,8760,240786
%N Largest determinant of 2n+1 X 2n+1 matrix with entries +-1 and 0 diagonal.
%D F. Bussemaker, I. Kaplansky, B. McKay, J. J. Seidel, Determinants of Matrices of the Conference Type, Linear Alg. Applications, vol. 261 (1997), 275-292.
%K nonn,hard,more
%O 1,1
%A _N. J. A. Sloane_.