A278431 Number of nX3 0..3 arrays with rows and columns in lexicographic nondecreasing order but with exactly one mistake.

40, 1609, 57760, 2116789, 67971132, 1796061464, 39513263094, 743248079740, 12242795030458, 179948822861856, 2394561544941994, 29174653111810701, 328380943500399272, 3439574456695348801, 33729578625174035514

Offset: 1

Author

R. H. Hardin, Nov 22 2016

Keywords

• nonn

Comments

Column 3 of A278435.

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210
• R. H. Hardin, Empirical polynomial of degree 127

Crossrefs

Cf. A278435.

Formula

Empirical polynomial of degree 127 (see link above)