|
|
A252624
|
|
Number of (n+2)X(2+2) 0..3 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 1 3 6 or 8
|
|
1
|
|
|
17704, 78710, 585774, 5013608, 45094726, 410194726, 3747351702, 34254637480, 313184238226, 2863795168360, 26186917115912, 239459836941634, 2189681762603196, 20023020430936170, 183095883696544566
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
|
|
LINKS
|
|
|
EXAMPLE
|
Some solutions for n=2
..2..0..2..3....3..1..0..1....2..2..3..2....0..3..2..0....3..1..3..1
..0..0..2..0....3..1..3..3....0..2..2..0....0..0..2..2....1..3..3..3
..2..0..0..2....1..3..1..1....2..0..0..0....0..2..0..0....1..3..3..3
..0..2..0..0....1..3..1..3....0..0..0..0....0..2..0..2....3..3..3..3
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|