|
|
A235438
|
|
Number of (n+1)X(2+1) 0..2 arrays with 2X2 subblock sums lexicographically nondecreasing rowwise and nonincreasing columnwise
|
|
1
|
|
|
450, 5295, 65497, 606279, 5672018, 42941705, 326261718, 2114123393, 13717203464, 78618554282, 450962719878, 2341563216530, 12169383655510, 58279149678143, 279416891742504, 1251184914041769, 5610028675479560, 23741327971799762
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
|
|
LINKS
|
|
|
EXAMPLE
|
Some solutions for n=3
..1..0..0....2..1..1....0..2..0....2..0..0....0..0..0....1..0..1....1..0..1
..0..2..0....1..0..2....0..0..0....2..2..0....2..1..0....2..1..1....2..0..0
..1..0..1....2..2..1....2..1..1....2..1..0....0..0..2....0..2..0....1..2..2
..1..2..1....2..2..2....0..1..1....2..2..1....2..2..1....1..2..2....1..2..2
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|