A278378 Number of n X n 0..1 arrays with rows and columns in lexicographic nondecreasing order but with exactly three mistakes.

0, 0, 74, 23640, 8632118, 6204309386, 11105331450864, 55821544343692020, 843729327193891754770, 40033544602806238643588014

Offset: 1

Author

R. H. Hardin, Nov 20 2016

Keywords

• nonn

Comments

Diagonal of A278385.

Examples

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

Crossrefs

Cf. A278385.