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A278630
Number of nX4 0..2 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly two mistakes.
1
15, 3354, 234484, 10776210, 387551595, 11719632199, 309971214338, 7350438329498, 158870607154260, 3165150394868325, 58584816738347925, 1013219703287606525, 16445858865221341430, 251416530890380206352
OFFSET
1,1
COMMENTS
Column 4 of A278634.
LINKS
EXAMPLE
Some solutions for n=2
..2..0..1..0. .1..2..2..1. .1..1..2..0. .0..0..2..2. .2..0..2..1
..0..0..1..2. .0..2..2..1. .1..1..1..2. .0..0..2..0. .0..0..1..2
CROSSREFS
Cf. A278634.
Sequence in context: A080691 A208584 A211903 * A161584 A013720 A230672
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 24 2016
STATUS
approved