|
|
A318546
|
|
Number of n X n 0..1 arrays with every element unequal to 1, 2, 4 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
|
|
0
|
|
|
|
OFFSET
|
1,2
|
|
COMMENTS
|
|
|
LINKS
|
|
|
EXAMPLE
|
Some solutions for n=5:
0 0 1 0 0 0 1 0 1 1 0 0 1 0 1 0 1 0 1 0
1 0 0 0 1 1 1 1 0 0 1 0 0 0 1 0 0 0 0 1
0 0 0 0 0 0 1 1 0 1 0 0 1 1 1 0 0 1 1 1
1 1 0 0 0 1 0 0 0 0 0 1 0 1 0 1 0 1 0 1
1 0 0 1 0 1 0 0 1 0 0 1 1 1 1 0 1 1 1 0
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn,more
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|