A278674 Number of nX6 0..1 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly one mistake.

35, 532, 4999, 38848, 280616, 1998526, 14437336, 106388729, 791018703, 5827280865, 41816145745, 288815214521, 1906968251924, 12001457552556, 71956255780683, 411365841721218, 2245996961511549, 11734146676561159

Offset

1,1

Comments

Column 6 of A278676.

Links

R. H. Hardin, Table of n, a(n) for n = 1..150

R. H. Hardin, Empirical polynomial of degree 70

Formula

Empirical polynomial of degree 70 (see link above)

Example

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

Crossrefs

Cf. A278676.

Sequence in context: A177079 A107915 A219370 * A219468 A267281 A114342

Adjacent sequences: A278671 A278672 A278673 * A278675 A278676 A278677

Keyword

nonn

Author

R. H. Hardin, Nov 25 2016

Status

approved