|
|
A251680
|
|
Number of (n+2)X(6+2) 0..2 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 2 or 4
|
|
1
|
|
|
12063, 36075, 184139, 1116829, 7229485, 47407259, 310560937, 2035481639, 13365199539, 87801989105, 576739855753, 3788602403057, 24890263396483, 163532123962817, 1074432510196251, 7059170770215635, 46379935274211457
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
|
|
LINKS
|
|
|
EXAMPLE
|
Some solutions for n=3
..0..0..0..0..0..0..0..0....0..0..0..0..0..1..0..0....0..0..0..0..0..0..0..0
..0..1..0..0..0..0..0..0....0..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..1..0....0..0..0..0..0..0..0..1
..0..0..0..0..0..0..0..1....1..0..0..0..0..0..0..0....0..0..0..0..0..0..0..0
..0..1..0..0..0..0..0..0....0..1..0..0..0..0..0..1....1..0..0..1..0..0..1..0
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|