A278549 Number of nX3 0..3 arrays with rows and columns in lexicographic nondecreasing order but with exactly two mistakes.

4, 1531, 124564, 6207774, 256173362, 9647190761, 327443433750, 9777854836324, 255595250091256, 5894080544358413, 121339401663068582, 2256920347962876651, 38335567041339845608, 600100691863091778854, 8724164918493189698726

Offset

1,1

Comments

Column 3 of A278553.

Links

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

R. H. Hardin, Empirical polynomial of degree 191

Formula

Empirical polynomial of degree 191 (see link above)

Example

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

Crossrefs

Cf. A278553.

Sequence in context: A094546 A203035 A030253 * A229664 A361449 A265661

Adjacent sequences: A278546 A278547 A278548 * A278550 A278551 A278552

Keyword

nonn

Author

R. H. Hardin, Nov 23 2016

Status

approved