A278775 Number of nX5 0..1 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly two mistakes.

6, 503, 10784, 150085, 1673658, 16205001, 141166787, 1126917480, 8340736743, 57745890265, 376707516550, 2329550843590, 13722943412752, 77304542920321, 417679484040714, 2169521229525151, 10853156575543255, 52367994237483811

Offset: 1

Author

R. H. Hardin, Nov 28 2016

Keywords

• nonn

Comments

Column 5 of A278778.

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210
• R. H. Hardin, Empirical polynomial of degree 69

Crossrefs

Cf. A278778.

Formula

Empirical polynomial of degree 69 (see link above)