Permanents and determinants of (0,1) matrices

[N. J. A. Sloane]

PS

Japp then said:

> How many times does the determinant (D) or permanent (P) of an m*m
> real (0,1)-matrix assume the value n (starting at n=0).

This can be extended to permanents of singular and non-singular matrices

AND I THINK that would give four more very nice new triangles

THANKS!

NJAS