

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
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OFFSET

1,1


COMMENTS



LINKS



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



KEYWORD

nonn


AUTHOR



STATUS

approved



