Number of positive-definite real {0,1} n X n matrices.

A085656

Number of positive-definite real {0,1} n X n matrices.

Terms

    a(0) =1a(1) =3a(2) =27a(3) =681a(4) =43369a(5) =6184475a(6) =1688686483a(7) =665444089745

External references