A278853 Number of nX6 0..1 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly three mistakes.

1, 1486, 118158, 4950399, 154090507, 4026240722, 92891826961, 1935392159582, 36831668321915, 644951602341507, 10454319538089429, 157736949429737228, 2227039251935175027, 29569631792451694669, 370951068728197563294

Offset

1,2

Comments

Column 6 of A278855.

Links

R. H. Hardin, Table of n, a(n) for n = 1..153

Example

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

Crossrefs

Cf. A278855.

Sequence in context: A269923 A288075 A104742 * A051260 A351675 A317593

Adjacent sequences: A278850 A278851 A278852 * A278854 A278855 A278856

Keyword

nonn

Author

R. H. Hardin, Nov 29 2016

Status

approved