A278410 Number of nX4 0..2 arrays with rows and columns in lexicographic nondecreasing order but with exactly two mistakes.

15, 2550, 201539, 11454780, 514122657, 20086951472, 724313811311, 24378309172117, 757386980723842, 21490393664858691, 555075804780316188, 13082453926050947533, 282833107470851109743, 5643469565485557711688

Offset

1,1

Comments

Column 4 of A278414.

Links

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

Example

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

Crossrefs

Cf. A278414.

Sequence in context: A208171 A266571 A308389 * A211902 A200797 A241116

Adjacent sequences: A278407 A278408 A278409 * A278411 A278412 A278413

Keyword

nonn

Author

R. H. Hardin, Nov 21 2016

Status

approved