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%I #13 Apr 01 2012 14:32:39
%S 1,6,168,26880
%N Number of orthogonal cocycles in Z^2(Z^t_2,Z_2).
%D Horadam, K. J., Hadamard matrices and their applications. Princeton University Press, Princeton, NJ, 2007. xiv+263 pp. See p. 132.
%K nonn,more
%O 1,2
%A _N. J. A. Sloane_, Feb 05 2012
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