|
|
A252771
|
|
Number of (n+2)X(1+2) 0..3 arrays with every consecutive three elements in every row, column and nw-se diagonal having exactly two distinct values, and new values 0 upwards introduced in row major order
|
|
1
|
|
|
234, 1028, 4687, 22295, 105956, 507049, 2429173, 11652188, 55960799, 268783174, 1291581364, 6207376902, 29836567197, 143422264585, 689472936242, 3314565767875, 15934867914351, 76608704638459, 368308600684650
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
|
|
LINKS
|
|
|
FORMULA
|
Empirical recurrence of order 63 (see link above)
|
|
EXAMPLE
|
Some solutions for n=4
..0..0..1....0..0..1....0..0..1....0..1..1....0..1..1....0..0..1....0..1..1
..2..1..2....1..2..2....1..2..2....1..2..1....1..2..1....1..0..1....2..1..1
..2..1..1....0..0..2....0..0..2....1..1..0....0..2..0....1..2..2....0..2..0
..1..3..1....0..2..0....1..2..1....0..2..0....0..1..1....0..2..2....0..1..1
..1..3..3....1..2..2....1..2..2....0..2..2....3..1..1....1..0..1....2..2..1
..3..2..3....1..1..2....0..0..2....2..0..0....3..3..0....0..2..2....0..1..0
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|