A278378 Number of n X n 0..1 arrays with rows and columns in lexicographic nondecreasing order but with exactly three mistakes.

0, 0, 74, 23640, 8632118, 6204309386, 11105331450864, 55821544343692020, 843729327193891754770, 40033544602806238643588014

Offset

1,3

Comments

Diagonal of A278385.

Links

Table of n, a(n) for n=1..10.

Example

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

Crossrefs

Cf. A278385.

Sequence in context: A337406 A250906 A268090 * A324523 A145695 A116132

Adjacent sequences: A278375 A278376 A278377 * A278379 A278380 A278381

Keyword

nonn

Author

R. H. Hardin, Nov 20 2016

Status

approved