|
|
A208632
|
|
Number of n X n 0..1 arrays with new values 0..1 introduced in row major order and no element equal to more than one of its immediate leftward or upward or right-upward antidiagonal neighbors
|
|
1
|
|
|
1, 5, 32, 225, 1652, 12404, 94320, 722733, 5565560, 43005391, 333132384, 2585476348, 20097106512, 156418938680, 1218807197408, 9506457334965, 74216779041840, 579903491112365, 4534776883051800, 35488119754971345
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,2
|
|
COMMENTS
|
|
|
LINKS
|
|
|
EXAMPLE
|
Some solutions for n=4
..0..1..1..1....0..0..1..0....0..0..1..0....0..1..1..0....0..1..1..1
..1..0..0..0....1..0..1..0....1..0..1..1....0..0..1..0....1..0..0..1
..0..1..1..1....1..0..1..0....0..1..0..1....1..0..1..1....1..1..0..1
..1..0..0..0....1..0..1..0....0..1..0..0....1..0..0..0....0..1..0..1
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|