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.
A000409
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.
Terms
- a(0) =0a(1) =6a(2) =350a(3) =43260a(4) =14591171a(5) =14657461469
External references
- oeis: A000409