A278307 Number of nX6 0..2 arrays with rows and columns in lexicographic nondecreasing order but with exactly one mistake.

266, 51562, 11557658, 2506281752, 507575149862, 100825279690194, 20065923383306483, 3886257287342627627, 704764955038032952712, 117079743963382645853885, 17705807900846493728558253

Offset: 1

Author

R. H. Hardin, Nov 17 2016

Keywords

• nonn

Comments

Column 6 of A278309.

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..45

Crossrefs

Cf. A278309.