A278304 Number of nX3 0..2 arrays with rows and columns in lexicographic nondecreasing order but with exactly one mistake.

16, 294, 4558, 70795, 986014, 11557658, 114457714, 979384739, 7403239385, 50338674135, 312278286478, 1787165528059, 9519474270945, 47534286373117, 223836172954845, 998984714458061, 4243782348859492, 17223599427090859

Offset: 1

Author

R. H. Hardin, Nov 17 2016

Keywords

• nonn

Comments

Column 3 of A278309.

Examples

			Some solutions for n=4
..0..0..1. .0..0..0. .0..0..1. .0..1..2. .0..2..2. .0..2..2. .0..1..2
..0..2..1. .2..0..2. .1..0..0. .1..2..2. .0..0..1. .2..0..2. .1..1..0
..2..0..2. .2..2..2. .1..0..0. .0..1..0. .0..1..1. .1..0..1. .2..2..0
..0..0..2. .2..2..2. .1..0..1. .0..1..1. .1..1..2. .2..0..1. .0..1..1
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210
• R. H. Hardin, Empirical polynomial of degree 53

Crossrefs

Cf. A278309.

Formula

Empirical polynomial of degree 53 (see link above)