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URL: https://oeis.org/A251129

⇱ A251129 - OEIS

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A251129
Number of (n+1)X(n+1) 0..2 arrays with no 2X2 subblock having the sum of its diagonal elements greater than the maximum of its antidiagonal elements.
0
40, 416, 1997, 8008, 25597, 79226, 223663, 620524, 1653313, 4340190, 11150995, 28282512, 70727013, 174943234, 428129015, 1038115892
OFFSET
1,1
COMMENTS
Diagonal of A251137
EXAMPLE
Some solutions for n=4
..0..0..0..0..2....0..0..0..1..2....0..0..2..2..2....0..1..0..2..2
..1..1..1..1..2....0..0..0..0..1....2..0..1..0..0....0..1..0..2..0
..0..0..0..0..1....2..0..0..0..1....2..0..1..0..0....0..1..0..2..0
..0..0..0..0..0....2..0..0..0..1....2..0..1..0..0....0..1..0..2..0
..1..1..1..1..0....2..0..0..0..1....2..0..1..0..0....2..1..0..2..0
CROSSREFS
Sequence in context: A253132 A293969 A168192 * A007772 A228122 A247408
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 30 2014
STATUS
approved