A081473 Smallest positive even number not the permanent of a real singular (0,1)-matrix of order n.

2, 4, 8, 16, 44, 194, 946

Offset: 1

Author

Jaap Spies, Nov 25 2003

Keywords

• hard
• more
• nonn

Examples

			a(4) = 16, see permanent frequency table: (0,27713), (2,9360), (4,3582), (6,1248), (8,648), (10,288), (12,48), (14,72), (18,16), (24,1).
		

Crossrefs

Cf. A089477.

Extensions

a(7) from Max Alekseyev, Sep 03 2023