|
| |
|
|
A283408
|
|
Number of n X n 0..1 arrays with no 1 equal to more than three of its horizontal, vertical and antidiagonal neighbors.
|
|
0
|
|
|
|
2, 16, 416, 39268, 12806920, 14511646624, 57400505786420, 789746010243688796, 37838366365836075668464, 6312472862913407007488479500, 3666528350801224509187871292147488
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
|
OFFSET
|
1,1
|
|
|
COMMENTS
|
|
|
|
LINKS
|
|
|
|
EXAMPLE
|
Some solutions for n=4
..1..0..0..1. .0..0..1..1. .1..0..1..0. .1..1..0..0. .0..0..0..1
..1..1..0..0. .1..0..0..0. .0..1..0..1. .0..0..0..1. .1..0..1..0
..0..1..0..0. .0..1..0..0. .1..0..1..0. .1..1..0..1. .0..0..0..1
..1..1..1..1. .0..0..0..0. .1..0..0..0. .0..0..0..0. .1..1..1..0
|
|
|
CROSSREFS
|
|
|
|
KEYWORD
|
nonn
|
|
|
AUTHOR
|
|
|
|
STATUS
|
approved
|
| |
|
|
