A278302 Number of n X n 0..2 arrays with rows and columns in lexicographic nondecreasing order but with exactly one mistake.

0, 32, 4558, 2360544, 6345491150, 100825279690194, 10174217016822816668, 6850575319751106211878878

Offset: 1

Author

R. H. Hardin, Nov 17 2016

Keywords

• nonn

Comments

Diagonal of A278309.

Examples

			Some solutions for n=3
..1..2..1. .1..2..2. .1..2..2. .1..1..0. .0..0..1. .0..1..0. .0..0..0
..2..0..0. .0..0..2. .2..1..2. .1..2..0. .1..0..1. .1..1..2. .1..0..2
..2..0..2. .2..0..1. .0..1..0. .1..2..0. .2..0..1. .1..2..0. .1..1..1
		

Crossrefs

Cf. A278309.