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A278410
Number of nX4 0..2 arrays with rows and columns in lexicographic nondecreasing order but with exactly two mistakes.
1
15, 2550, 201539, 11454780, 514122657, 20086951472, 724313811311, 24378309172117, 757386980723842, 21490393664858691, 555075804780316188, 13082453926050947533, 282833107470851109743, 5643469565485557711688
OFFSET
1,1
COMMENTS
Column 4 of A278414.
LINKS
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
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 21 2016
STATUS
approved