|
|
A317772
|
|
Number of nX7 0..1 arrays with every element unequal to 0, 1 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
|
|
1
|
|
|
21, 30, 44, 32, 42, 54, 75, 107, 149, 221, 317, 491, 739, 1157, 1774, 2819, 4306, 6792, 10478, 16717, 25903, 41123, 63905, 101339, 158206, 252088, 395573, 629930, 993422, 1586551, 2503753, 3994117, 6322941, 10097970, 15999961, 25564515, 40566306
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
|
|
LINKS
|
|
|
EXAMPLE
|
Some solutions for n=5
..0..0..0..1..0..1..1. .0..0..0..1..1..1..1. .0..0..0..0..1..0..1
..0..0..0..1..0..0..1. .0..0..0..0..1..1..1. .0..0..0..0..1..0..0
..0..0..1..1..0..0..0. .1..0..0..0..0..1..1. .0..0..0..1..1..0..0
..0..0..1..0..0..0..0. .1..1..0..0..0..0..1. .1..0..0..1..0..0..0
..1..0..1..0..0..0..0. .1..1..1..0..0..0..0. .1..1..0..1..0..0..0
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|