|
| |
|
|
A266466
|
|
Number of nX4 binary arrays with rows and columns lexicographically nondecreasing and column sums nonincreasing.
|
|
1
|
|
|
|
2, 6, 19, 66, 232, 794, 2574, 7797, 22058, 58469, 146027, 345578, 779240, 1682359, 3492869, 6999952, 13585959, 25610002, 47004982, 84187248, 147421139, 252829908, 425319569, 702767285, 1141951244, 1826839569, 2880058656, 4478585700
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
|
OFFSET
|
1,1
|
|
|
COMMENTS
|
|
|
|
LINKS
|
|
|
|
EXAMPLE
|
Some solutions for n=4
..0..1..1..1....0..0..0..1....0..0..0..0....0..0..1..1....0..1..1..1
..1..0..0..1....0..0..0..1....0..1..1..1....0..1..0..0....0..1..1..1
..1..1..1..0....1..1..1..0....1..0..0..0....1..0..0..0....1..0..0..0
..1..1..1..1....1..1..1..0....1..0..0..0....1..1..0..0....1..0..0..0
|
|
|
CROSSREFS
|
|
|
|
KEYWORD
|
nonn
|
|
|
AUTHOR
|
|
|
|
STATUS
|
approved
|
| |
|
|
