A089475 Number of different values taken by the permanent of a real nonsingular (0,1)-matrix of order n.

1, 1, 3, 9, 31, 149

Offset: 1

Author

Hugo Pfoertner, Nov 11 2003

Keywords

• more
• nonn

Comments

This sequence was first provided by Jaap Spies.

Examples

			a(4) = 9 because the permanents of non-singular 4 X 4 (0,1)-matrices can take the values 1,2,..,7,9,11.
		

Crossrefs

Cf. A055165, A089480, A089476.

Extensions

a(6) from Jaap Spies, Nov 12 2003