A278651 Number of nX3 0..2 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly three mistakes.

0, 24, 3626, 210616, 6920404, 159247403, 2864009499, 42845787540, 554117433244, 6355099136464, 65799797930768, 623184291450452, 5453523684543697, 44451113263114337, 339679040853270337, 2446811447909875619

Offset

1,2

Comments

Column 3 of A278656.

Links

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

R. H. Hardin, Empirical polynomial of degree 97

Formula

Empirical polynomial of degree 97 (see link above)

Example

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

Crossrefs

Cf. A278656.

Sequence in context: A061530 A275637 A223123 * A357266 A166768 A326120

Adjacent sequences: A278648 A278649 A278650 * A278652 A278653 A278654

Keyword

nonn

Author

R. H. Hardin, Nov 25 2016

Status

approved