A278323 Number of nX6 0..1 arrays with rows and columns in lexicographic nondecreasing order but with exactly two mistakes.

21, 1492, 51229, 1548002, 43798840, 1133034160, 26606146271, 577253086055, 11856994168275, 234252250004719, 4462457602929707, 81437338008292870, 1411665474225016752, 23098384621606953307, 355699829714059120732

Offset: 1

Author

R. H. Hardin, Nov 18 2016

Keywords

• nonn

Comments

Column 6 of A278325.

Examples

			Some solutions for n=3
..0..1..0..1..1..0. .0..1..0..1..0..1. .0..0..0..1..1..1. .0..1..0..1..1..1
..1..0..1..0..1..1. .0..1..1..0..1..0. .0..1..1..1..1..1. .1..0..0..1..0..0
..1..1..0..0..1..0. .1..0..1..1..0..1. .1..1..0..1..1..0. .1..0..0..1..0..1
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..150

Crossrefs

Cf. A278325.