|
|
A303955
|
|
Number of n X n 0..1 arrays with every element unequal to 0, 1, 2 or 5 king-move adjacent elements, with upper left element zero.
|
|
0
|
|
|
1, 4, 11, 61, 480, 4645, 44492, 702361, 14109468, 304650192, 7364610974, 278434000222, 13220477918463, 731634405964583, 46466846105770369, 4048357298616866249, 456085181923327713731
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,2
|
|
COMMENTS
|
|
|
LINKS
|
|
|
EXAMPLE
|
Some solutions for n=5
..0..0..0..1..0. .0..0..0..0..0. .0..0..1..1..0. .0..0..1..0..0
..1..0..0..0..0. .0..0..0..0..1. .0..0..1..1..0. .0..0..0..0..0
..0..0..0..0..0. .1..0..0..0..0. .0..0..0..0..0. .0..0..0..0..0
..0..0..0..0..1. .0..0..0..0..0. .0..0..0..0..0. .1..0..0..0..1
..0..0..0..0..0. .0..0..1..0..0. .0..1..0..0..0. .0..0..1..0..0
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|