|
|
A252498
|
|
Number of (n+2)X(2+2) 0..3 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum less than 5
|
|
1
|
|
|
201803, 8200869, 379549048, 16121522385, 688488765345, 29873208668671, 1289677303950945, 55601840524341479, 2400455819897175867, 103620469170530818520, 4472006410540617508883, 193017617970493153804917
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
|
|
LINKS
|
|
|
EXAMPLE
|
Some solutions for n=1
..0..0..2..2....0..1..0..2....0..0..3..1....2..0..1..2....2..0..1..0
..1..0..1..1....0..2..0..1....2..1..1..0....2..0..1..0....0..2..0..2
..2..0..1..0....1..0..1..0....0..0..0..3....0..1..1..0....1..2..0..0
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|