A278848 Number of n X n 0..1 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly three mistakes.

0, 0, 66, 30772, 9317846, 4026240722, 3637198028018, 8472288445687482, 56864856173457018228, 1168082099198500119983316

Offset: 1

Author

R. H. Hardin, Nov 29 2016

Keywords

• nonn

Comments

Diagonal of A278855.

Examples

			Some solutions for n=4
..1..1..1..0. .1..1..0..0. .1..0..1..1. .1..1..1..0. .1..1..1..0
..1..0..1..1. .1..1..0..0. .0..1..1..0. .1..0..1..1. .1..1..0..1
..0..0..0..0. .0..1..0..1. .0..0..0..1. .0..0..1..1. .1..0..0..1
..1..0..1..0. .1..0..1..0. .0..1..1..1. .1..1..1..0. .0..1..1..1
		

Crossrefs

Cf. A278855.