A278673 Number of nX5 0..1 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly one mistake.

20, 245, 1801, 10584, 55854, 280616, 1378241, 6654535, 31404174, 143558071, 630909284, 2653428584, 10658877991, 40894491453, 150023824702, 527191888255, 1778244684147, 5769938709484, 18048492750432, 54537766679216

Offset

1,1

Comments

Column 5 of A278676.

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

R. H. Hardin, Empirical polynomial of degree 37

Formula

Empirical polynomial of degree 37 (see link above)

Example

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

Crossrefs

Cf. A278676.

Sequence in context: A140124 A123954 A125432 * A055757 A022744 A081143

Adjacent sequences: A278670 A278671 A278672 * A278674 A278675 A278676

Keyword

nonn

Author

R. H. Hardin, Nov 25 2016

Status

approved