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A278629 Number of nX3 0..2 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly two mistakes. 1
1, 285, 10824, 234484, 3739008, 48592635, 541463431, 5325263364, 47098291840, 379621129293, 2817194942225, 19407777240447, 124964309624036, 756392815286668, 4325156175914066, 23464134450391209, 121221027131246039 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Column 3 of A278634.
LINKS
FORMULA
Empirical polynomial of degree 70 (see link above)
EXAMPLE
Some solutions for n=3
..1..2..1. .2..0..2. .1..0..2. .2..0..1. .2..0..0. .2..2..1. .0..1..0
..0..0..0. .0..2..0. .0..0..1. .0..2..1. .2..1..2. .2..1..2. .2..2..2
..1..1..0. .2..2..2. .1..0..1. .1..0..2. .2..0..0. .1..2..1. .1..0..0
CROSSREFS
Cf. A278634.
Sequence in context: A176712 A225881 A332919 * A241970 A231422 A146893
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 24 2016
STATUS
approved

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Last modified March 28 10:55 EDT 2024. Contains 371241 sequences. (Running on oeis4.)