21040112

Appears in sequences

• Number of n X n rational {0,1}-matrices of determinant 0.at n=4A046747
• Triangle T(n,k) read by rows, where T(n,k) = number of times the determinant of a real n X n (0,1)-matrix takes the value k, for n >= 0, 0 <= k <= A003432(n).at n=13A089478