login
A278605
Number of nX2 0..3 arrays with rows and columns in lexicographic nondecreasing order but with exactly three mistakes.
1
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.
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
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 23 2016
STATUS
approved