|
| |
|
|
A252394
|
|
Number of (n+2)X(3+2) 0..2 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum less than 4
|
|
1
|
|
|
|
224346, 9807871, 454970982, 19516646285, 851022689884, 37408598546844, 1637298217327736, 71675190624017977, 3139889940063837080, 137516081439046961836, 6022451091771727200405, 263767184952534766097247
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
|
OFFSET
|
1,1
|
|
|
COMMENTS
|
|
|
|
LINKS
|
|
|
|
EXAMPLE
|
Some solutions for n=1
..0..0..1..0..0....0..1..1..1..0....0..0..0..0..1....0..0..1..0..1
..1..0..0..0..0....1..1..1..1..0....0..0..1..0..0....0..0..1..0..1
..0..1..0..0..2....0..0..0..0..1....1..0..1..1..1....0..1..0..2..1
|
|
|
CROSSREFS
|
|
|
|
KEYWORD
|
nonn
|
|
|
AUTHOR
|
|
|
|
STATUS
|
approved
|
| |
|
|
