|
|
A204413
|
|
Number of (n+2)X6 0..2 arrays with every 3X3 subblock having three strictly increasing elements in a row horizontally or vertically, exactly one way
|
|
1
|
|
|
2827014, 5597126, 5776350, 11785518, 89459577, 1122887052, 6016853259, 53009843553, 657496617930, 3488279987673, 30601214237808, 379380427569216, 2012724444183552, 17656894601957952, 218902435623346176
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
|
|
LINKS
|
|
|
FORMULA
|
Empirical: a(n) = 577*a(n-3) for n>15
|
|
EXAMPLE
|
Some solutions for n=3
..0..1..0..0..1..0....2..1..2..0..2..0....2..0..1..2..0..2....0..0..0..2..2..0
..1..0..0..1..0..0....1..2..2..1..0..0....0..0..0..1..2..2....0..2..1..0..1..1
..2..1..0..2..1..0....0..1..2..2..1..0....0..1..2..0..1..2....2..2..2..1..0..2
..2..2..1..2..2..1....0..0..1..2..2..1....1..0..1..2..2..0....0..1..2..2..1..1
..2..1..2..0..2..2....2..2..0..1..2..2....0..1..0..1..2..0....1..0..1..2..2..2
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|