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A230268 Number of n X n 0..2 arrays x(i,j) with each element horizontally or vertically next to at least one element with value (x(i,j)+1) mod 3, and upper left element zero 0
0, 0, 28, 5734, 5524854, 28716109350, 810027275568580, 124090541934393885346 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,3
COMMENTS
Diagonal of A230275
LINKS
EXAMPLE
Some solutions for n=3
..0..0..1....0..1..2....0..1..0....0..2..2....0..2..1....0..2..1....0..2..1
..1..0..2....2..1..0....2..2..2....1..1..0....1..2..0....1..2..0....1..2..0
..2..0..1....2..0..2....1..0..2....2..0..2....0..1..0....0..2..1....0..1..2
CROSSREFS
Sequence in context: A131315 A200999 A221935 * A203328 A159407 A099058
KEYWORD
nonn
AUTHOR
R. H. Hardin, Oct 14 2013
STATUS
approved

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Last modified February 25 06:40 EST 2024. Contains 370310 sequences. (Running on oeis4.)