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A278848
Number of n X n 0..1 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly three mistakes.
0
0, 0, 66, 30772, 9317846, 4026240722, 3637198028018, 8472288445687482, 56864856173457018228, 1168082099198500119983316
OFFSET
1,3
COMMENTS
Diagonal of A278855.
EXAMPLE
Some solutions for n=4
..1..1..1..0. .1..1..0..0. .1..0..1..1. .1..1..1..0. .1..1..1..0
..1..0..1..1. .1..1..0..0. .0..1..1..0. .1..0..1..1. .1..1..0..1
..0..0..0..0. .0..1..0..1. .0..0..0..1. .0..0..1..1. .1..0..0..1
..1..0..1..0. .1..0..1..0. .0..1..1..1. .1..1..1..0. .0..1..1..1
CROSSREFS
Cf. A278855.
Sequence in context: A167778 A199838 A188453 * A110150 A358862 A295790
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 29 2016
STATUS
approved