|
|
A204866
|
|
Number of (n+2)X9 0..1 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically, diagonally or antidiagonally exactly two different ways, and new values 0..1 introduced in row major order
|
|
1
|
|
|
283877, 2660367, 28334280, 309173896, 3572132537, 40833480416, 463699765823, 5337233301716, 61245366854871, 699327395092621, 8041377023804442, 92258561040986700, 1056397619905286761, 12133997044683483280
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
|
|
LINKS
|
|
|
EXAMPLE
|
Some solutions for n=3
..0..1..1..1..1..0..1..0..0....0..0..0..0..0..0..0..1..0
..0..1..1..0..0..1..1..1..0....0..1..1..0..1..0..1..0..0
..0..0..0..0..0..0..1..0..1....1..1..1..1..1..1..1..1..0
..1..1..1..1..0..1..0..0..0....0..0..0..0..0..0..0..0..0
..1..0..1..1..1..1..1..0..1....1..1..0..1..1..0..1..0..0
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|