login
A278651
Number of nX3 0..2 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly three mistakes.
1
0, 24, 3626, 210616, 6920404, 159247403, 2864009499, 42845787540, 554117433244, 6355099136464, 65799797930768, 623184291450452, 5453523684543697, 44451113263114337, 339679040853270337, 2446811447909875619
OFFSET
1,2
COMMENTS
Column 3 of A278656.
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
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 25 2016
STATUS
approved