A278776 Number of nX6 0..1 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly two mistakes.

21, 1750, 48501, 955347, 16205001, 251740932, 3634987413, 48847405083, 611199661843, 7140933364136, 78280456105686, 809842005695656, 7953581118077240, 74557744904209329, 670158115881138987

Offset: 1

Author

R. H. Hardin, Nov 28 2016

Keywords

• nonn

Comments

Column 6 of A278778.

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..153
• R. H. Hardin, Empirical polynomial of degree 134

Crossrefs

Cf. A278778.

Formula

Empirical polynomial of degree 134 (see link above)