|
|
A251886
|
|
Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row and column sum not 2 3 6 or 7 and every diagonal and antidiagonal sum 2 3 6 or 7
|
|
0
|
|
|
1280, 1232, 556, 1316, 3530, 9836, 33218, 252162, 1017410, 4251650, 95453186, 461119490, 2176843778, 165104582658, 884163477506, 4458176053250, 1236435185172482, 6998537539682306, 36521378228207618
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
|
|
LINKS
|
|
|
EXAMPLE
|
Some solutions for n=4
..1..1..2..1..1..2....2..1..1..2..1..1....2..1..2..1..1..3....3..2..3..3..2..3
..3..0..1..0..0..1....1..0..0..1..0..3....3..0..1..0..0..1....3..2..3..3..2..0
..0..0..1..0..0..1....1..0..0..1..0..0....0..0..1..0..0..1....2..0..2..2..0..2
..1..1..3..1..1..2....2..1..1..3..1..1....1..1..3..1..1..3....3..2..3..3..2..3
..0..0..1..0..0..1....1..0..0..1..0..0....0..0..1..0..0..1....3..2..3..3..2..3
..0..0..1..0..3..1....1..0..0..1..0..0....0..0..1..0..0..1....2..0..2..2..1..2
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|