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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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A183413

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..32

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

Adjacent sequences:  A183409 A183410 A183411 * A183413 A183414 A183415

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 04 2011

STATUS

approved

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Last modified February 21 01:03 EST 2019. Contains 320362 sequences. (Running on oeis4.)