**Singular n X n (0,1)-matrices: the number of n X n (0,1)-matrices having distinct, nonzero ordered rows, but having at least two equal columns or at least one zero column.**

*0, 6, 350, 43260, 14591171, 14657461469, 46173502811223, 474928141312623525*

*1 seqfan posts*

Index of A-numbers in seqfan: by ascending order by month by frequency by keyword

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