|
|
A203915
|
|
Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock having equal diagonal elements or equal antidiagonal elements, and new values 0..1 introduced in row major order
|
|
0
|
|
|
112, 1682, 21470, 262088, 3191760, 38438912, 457030140, 5384729088, 62912016986, 730166033682, 8416701868906, 96505946204192, 1100473855059936, 12494678609945088, 141221958080796180, 1590433321339235592
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
|
|
LINKS
|
|
|
EXAMPLE
|
Some solutions for n=3
..0..1..0..1..1....0..0..1..0..0....0..1..0..0..0....0..0..1..0..0
..1..0..1..1..1....0..1..0..0..1....1..0..0..0..1....0..1..0..1..1
..0..1..1..1..0....1..0..0..1..0....0..0..0..0..0....1..0..1..0..1
..1..1..1..1..0....0..0..1..0..0....0..0..0..0..0....1..1..0..1..0
..1..0..0..1..1....0..1..1..1..0....0..1..1..0..0....0..1..1..0..0
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|