|
|
A251186
|
|
Number of (n+2)X(n+2) 0..1 arrays with nondecreasing sum of every three consecutive values in every row and column
|
|
1
|
|
|
512, 7776, 209952, 10077696, 259200000, 9600000000, 512000000000, 16807000000000, 720600125000000, 40353607000000000, 1525017689435520000, 71151225318303621120, 4098310578334288576512, 169762607240564688666624
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
|
|
LINKS
|
|
|
EXAMPLE
|
Some solutions for n=2
..0..0..1..1....0..1..0..0....0..0..0..0....0..1..1..1....0..0..0..0
..1..0..1..1....1..1..1..1....0..1..1..1....1..0..0..1....0..1..0..0
..0..0..0..0....0..0..1..0....0..0..0..0....0..1..1..1....0..0..0..1
..0..1..1..1....1..1..0..1....0..1..0..1....1..1..1..1....0..0..0..1
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|