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A251047
Number of (n+1)X(n+1) 0..3 arrays with no 2X2 subblock having the sum of its diagonal elements greater than the absolute difference of its antidiagonal elements
0
66, 1528, 10289, 59215, 248803, 1081183, 4118693, 15940227, 57664667, 206905931, 713141125, 2417509205, 7978402597
OFFSET
1,1
COMMENTS
Diagonal of A251055
EXAMPLE
Some solutions for n=4
..0..1..1..1..3....0..0..3..0..3....2..0..3..0..3....0..0..1..1..2
..0..0..0..0..0....0..0..3..0..3....2..0..3..0..2....1..0..0..0..0
..1..1..1..1..1....0..0..3..0..2....2..0..3..0..1....2..0..0..0..0
..0..0..0..0..0....0..0..3..0..2....2..0..3..0..1....2..0..0..0..0
..2..2..0..0..0....0..0..3..0..0....3..0..3..0..0....3..1..1..1..1
CROSSREFS
Sequence in context: A269693 A278850 A104673 * A279889 A241799 A269498
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 29 2014
STATUS
approved