|
|
A250498
|
|
Number of (n+2)X(2+2) 0..1 arrays with nondecreasing medians of every three consecutive values in every row and column
|
|
1
|
|
|
2744, 23096, 181058, 1410255, 9788132, 64023155, 409593826, 2524591167, 15066718470, 88100873940, 505277709506, 2845393524899, 15788358013248, 86483717929940, 468157706230284, 2507909862945678, 13310785933432322
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
|
|
LINKS
|
|
|
EXAMPLE
|
Some solutions for n=3
..0..1..0..0....0..0..0..1....0..0..0..0....0..0..0..1....0..0..0..1
..1..0..1..1....1..1..0..1....1..1..1..0....0..0..0..1....0..1..0..1
..0..1..0..1....1..1..1..0....0..1..1..1....0..1..1..0....1..0..0..1
..1..1..1..0....1..1..1..1....0..0..1..0....0..1..0..1....0..0..1..0
..1..1..1..1....1..1..0..1....1..1..1..0....1..1..0..1....0..0..1..1
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|