|
|
A184188
|
|
Half the number of (n+1)X(n+1) binary arrays with no 2X2 subblock containing exactly one 1
|
|
1
|
|
|
6, 104, 5074, 723635, 294738261, 345350598641, 1159953545419800, 11179084602659460821, 309007688117388883362756, 24500703075201459753727015848, 5572033834554753242178727061445289
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
|
|
LINKS
|
|
|
EXAMPLE
|
Some solutions for 3X3
..1..0..1....1..0..1....1..0..1....0..1..0....0..1..0....1..0..0....1..0..0
..1..1..1....0..1..1....1..1..1....1..1..1....1..0..1....0..1..1....0..1..1
..1..1..1....1..0..0....0..0..0....0..1..1....1..1..1....0..1..0....1..1..1
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|