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%I #7 Jan 23 2020 03:39:01
%S 1,3,27,880,97090,34923518,40885781314
%N Number of singular n X n matrices whose rows are distinct (0,1) vectors arranged in increasing order.
%C It appears that the determinant is computed over the rationals, not over GF(2).
%D M. B. Wells, Elements of Combinatorial Computing, Pergamon, Oxford, 1971.
%H J. S. Huang and B. L. Raktoe, <a href="https://doi.org/10.1016/0097-3165(77)90052-8">A note on the proportion of singular (0, 1)-matrices in a class associated with fractional 2n factorial designs</a>, Journal of Combinatorial Theory, Series A 22.2 (1977): 231-234.
%e The three 2 X 2 matrices are [00/01], [00/10], [00/11].
%K nonn,more
%O 1,2
%A _N. J. A. Sloane_, Jan 21 2020
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