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A183403
Number of n X n binary arrays with each sum of a(1..i,1..j) no greater than i*j/2
0
1, 7, 114, 12203, 3770481, 6583423572, 36263011629138, 1032996356637032944, 97616935274858472388880
OFFSET
1,2
COMMENTS
Diagonal of A183407
EXAMPLE
Some solutions for 4X4
..0..0..1..1....0..0..1..0....0..0..1..0....0..0..1..0....0..0..0..1
..1..0..0..1....0..1..0..0....1..0..0..1....1..1..0..0....0..0..0..1
..0..0..0..1....0..0..1..0....0..0..1..0....0..0..1..0....1..0..0..1
..0..0..0..0....0..1..0..1....0..1..0..0....0..1..0..0....1..0..1..1
CROSSREFS
Sequence in context: A199672 A240288 A220343 * A127877 A082487 A081798
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 04 2011
STATUS
approved