A278605 Number of nX2 0..3 arrays with rows and columns in lexicographic nondecreasing order but with exactly three mistakes.

0, 0, 395, 16224, 354696, 6208804, 94510277, 1235465691, 13780447802, 132510394588, 1117003717258, 8394295309778, 57076381840494, 355509912080514, 2049367954200226, 11026586497658309, 55766838990035825, 266680636061199341

Offset

1,3

Comments

Column 2 of A278610.

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

R. H. Hardin, Empirical polynomial of degree 63

Formula

Empirical polynomial of degree 63 (see link above)

Example

Some solutions for n=4
..3..3. .3..2. .2..0. .3..1. .3..2. .3..2. .2..0. .2..1. .3..1. .3..3
..2..1. .0..0. .0..0. .0..3. .1..2. .2..3. .1..3. .1..0. .2..1. .0..0
..3..1. .2..0. .3..3. .0..2. .2..3. .1..3. .1..2. .0..1. .0..3. .3..3
..0..1. .0..3. .0..3. .0..3. .0..1. .2..3. .3..3. .3..3. .3..3. .3..0

Crossrefs

Cf. A278610.

Sequence in context: A267965 A268030 A278610 * A278269 A278606 A230450

Adjacent sequences: A278602 A278603 A278604 * A278606 A278607 A278608

Keyword

nonn

Author

R. H. Hardin, Nov 23 2016

Status

approved