|
| |
|
|
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
|
|
|
|
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
|
|
|
|
KEYWORD
|
nonn
|
|
|
AUTHOR
|
|
|
|
STATUS
|
approved
|
| |
|
|
