A278380 Number of nX3 0..1 arrays with rows and columns in lexicographic nondecreasing order but with exactly three mistakes.

0, 3, 74, 1220, 12910, 100807, 652343, 3750182, 19784428, 96786947, 439906101, 1859501560, 7328752206, 27039030100, 93829708460, 307762056698, 958683800155, 2848583303210, 8105942966932, 22169003715353, 58456685214757

Offset: 1

Author

R. H. Hardin, Nov 20 2016

Keywords

• nonn

Comments

Column 3 of A278385.

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210
• R. H. Hardin, Empirical polynomial of degree 31

Crossrefs

Cf. A278385.

Formula

Empirical polynomial of degree 31 (see link above)