login
A208252
Number of n X n 0..2 arrays with new values 0..2 introduced in row major order and no element equal to more than one of its immediate leftward or upward neighbors
1
1, 12, 2040, 2445264, 20662697664, 1230875651548608, 516901401841519506624, 1530268623239822606574667872, 31936997040921403605588139690977984, 4698799611233642481043318409392291549604736
OFFSET
1,2
COMMENTS
Diagonal of A208258
LINKS
EXAMPLE
Some solutions for n=4
..0..0..0..1....0..0..0..0....0..0..1..2....0..0..0..0....0..0..0..1
..1..1..0..1....1..0..1..0....0..2..2..0....0..1..0..2....2..1..0..2
..2..2..1..0....2..2..1..2....2..0..0..1....2..0..1..2....2..0..1..2
..1..1..0..1....0..0..2..0....2..1..2..1....0..2..1..0....1..0..1..2
CROSSREFS
Sequence in context: A323817 A263584 A323816 * A204622 A369336 A004823
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 24 2012
STATUS
approved