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A251121
Number of (n+1)X(n+1) 0..1 arrays with no 2X2 subblock having the sum of its diagonal elements greater than the maximum of its antidiagonal elements
0
10, 40, 108, 266, 580, 1214, 2420, 4702, 8926, 16680, 30766, 56180, 101734, 182956, 327080, 581742, 1030000, 1816290, 3191136, 5588050, 9755530, 16983260, 29489098
OFFSET
1,1
COMMENTS
Diagonal of A251128
EXAMPLE
Some solutions for n=4
..0..0..0..0..1....0..0..0..1..1....0..0..0..1..1....1..0..1..0..1
..0..0..0..0..1....0..0..0..0..0....1..0..0..0..0....1..0..1..0..1
..0..0..0..0..1....1..1..1..1..1....1..0..0..0..0....1..0..1..0..0
..0..0..0..0..0....0..0..0..0..0....1..0..0..0..0....1..0..1..0..0
..1..0..0..0..0....1..1..0..0..0....1..0..0..0..0....1..0..1..0..0
CROSSREFS
Sequence in context: A131037 A071233 A063490 * A002419 A199826 A227056
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 30 2014
STATUS
approved