login
A278669
Number of n X n 0..1 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly one mistake.
0
0, 8, 158, 2650, 55854, 1998526, 157706284, 32788533228, 19802007716084, 36574110002226508
OFFSET
1,2
COMMENTS
Diagonal of A278676.
EXAMPLE
Some solutions for n=4
..1..1..0..0. .1..1..0..0. .0..0..1..1. .0..0..0..0. .1..0..0..0
..1..1..0..0. .1..0..1..0. .1..0..1..1. .0..0..0..0. .0..1..1..0
..1..1..1..0. .1..0..1..0. .1..1..1..0. .1..0..1..0. .1..1..1..0
..1..1..0..0. .1..1..0..0. .1..1..1..1. .1..1..0..1. .1..1..1..0
CROSSREFS
Cf. A278676.
Sequence in context: A211043 A025605 A114223 * A201030 A127369 A364741
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 25 2016
STATUS
approved