|
|
A233707
|
|
Number of (2+2)X(n+2) 0..3 arrays with no increasing sequence of length 3 horizontally, vertically, diagonally downwards or antidiagonally downwards
|
|
1
|
|
|
7461298, 1062275284, 153005653333, 22080932709668, 3177351078952806, 457215707043324925, 65761185809057053136, 9458740008014999202030, 1360386895132440641594475, 195656814538501836517681346
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
|
|
LINKS
|
|
|
EXAMPLE
|
Some solutions for n=1
..0..0..0....1..1..1....1..1..1....1..0..1....0..0..0....0..0..1....1..0..0
..0..2..1....0..0..0....0..1..0....0..0..0....1..3..0....0..3..1....0..1..0
..2..0..1....2..2..3....3..3..0....1..0..0....1..1..0....2..0..0....0..0..1
..0..3..0....2..1..1....2..3..2....1..3..3....1..0..2....0..1..0....1..2..0
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|