A278631 Number of nX5 0..2 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly two mistakes.

90, 27521, 3739008, 387551595, 33967584488, 2593097277036, 175644502146694, 10734760074025367, 600850493598843960, 31181144570813141891, 1514424057857433189463, 69299571270775145840652

Offset: 1

Author

R. H. Hardin, Nov 24 2016

Keywords

• nonn

Comments

Column 5 of A278634.

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..101

Crossrefs

Cf. A278634.