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A183412
Number of nX5 binary arrays with each sum of a(1..i,1..j) no greater than i*j/2 and rows and columns in nondecreasing order
1
3, 21, 152, 1518, 11499, 98343, 556989, 3662106, 16124119, 85225430, 312644461, 1392323322, 4440186675, 17261781178, 49427257741, 171990299716, 450949023627, 1430808802178, 3490735786071, 10240050566337, 23490703637555
OFFSET
1,1
COMMENTS
Column 5 of A183413
LINKS
EXAMPLE
Some solutions for 4X5
..0..0..0..0..1....0..0..0..0..1....0..0..0..0..0....0..0..0..0..1
..0..0..1..1..0....0..0..1..1..1....0..0..1..1..1....0..0..0..0..1
..1..1..0..0..0....0..1..0..0..0....0..1..0..0..1....0..1..1..1..1
..1..1..1..1..0....1..1..1..1..0....0..1..0..1..1....1..0..0..0..0
CROSSREFS
Sequence in context: A037656 A074577 A007566 * A155627 A163472 A229809
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 04 2011
STATUS
approved