A278854 Number of nX7 0..1 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly three mistakes.

8, 7072, 731444, 44571591, 2167109763, 92891826961, 3637198028018, 131770344218055, 4438698421228261, 139356074010503663, 4085772882929981162, 112111211337670010640, 2886455827088580869876, 69931800720183748326477

Offset: 1

Author

R. H. Hardin, Nov 29 2016

Keywords

• nonn

Comments

Column 7 of A278855.

Examples

			Some solutions for n=2
..1..0..1..1..1..1..0. .0..1..0..0..0..0..0. .0..1..1..0..1..1..1
..1..0..0..0..0..1..1. .0..0..1..1..0..1..1. .1..0..1..0..1..0..0
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..83

Crossrefs

Cf. A278855.