A278623 Number of n X 4 0..2 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly one mistake.

51, 1952, 49503, 1069536, 21121532, 387542112, 6594175430, 103536313036, 1496475492375, 19928249063688, 245280439959902, 2802425055340520, 29863427285241827, 298206737876251916, 2802780797553511873

Offset: 1

Author

R. H. Hardin, Nov 24 2016

Keywords

• nonn

Comments

Column 4 of A278627.

Examples

			Some solutions for n=3
..0..2..2..0. .1..1..0..0. .1..1..1..0. .0..0..1..0. .1..1..1..0
..2..0..0..2. .1..1..1..2. .2..1..0..2. .1..1..0..1. .2..0..0..1
..2..2..0..0. .1..1..2..2. .0..1..0..0. .2..1..1..2. .1..0..0..2
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210
• R. H. Hardin, Empirical polynomial of degree 125

Crossrefs

Cf. A278627.

Formula

Empirical polynomial of degree 125 (see link above).