A278381 Number of nX4 0..1 arrays with rows and columns in lexicographic nondecreasing order but with exactly three mistakes.

0, 40, 1220, 23640, 368421, 4703562, 50473056, 474255829, 4047341159, 32112086692, 239321493757, 1678998378973, 11080464577870, 68753466828933, 401430915176013, 2209957957528646, 11503598362204972, 56799460197673429

Offset: 1

Author

R. H. Hardin, Nov 20 2016

Keywords

• nonn

Comments

Column 4 of A278385.

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210
• R. H. Hardin, Empirical polynomial of degree 63

Crossrefs

Cf. A278385.

Formula

Empirical polynomial of degree 63 (see link above)