

A250974


Number of (n+1)X(n+1) 0..2 arrays with no 2X2 subblock having the sum of its diagonal elements less than the absolute difference of its antidiagonal elements


0



71, 12077, 15156945, 139471732486, 9416933752243198, 4665050923272559405591, 16956293118548007574241097692, 452201064244928394467769407865217365, 88482711640559551663354157554544852988982071
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OFFSET

1,1


COMMENTS



LINKS



EXAMPLE

Some solutions for n=2
..1..2..2....0..1..0....2..2..2....2..2..1....2..1..0....1..2..0....2..2..1
..2..2..1....0..2..1....0..1..0....2..0..2....1..0..2....1..2..2....1..1..1
..0..2..1....2..0..0....1..0..2....2..2..2....2..2..2....1..1..0....2..1..1


CROSSREFS



KEYWORD

nonn


AUTHOR



STATUS

approved



