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A197425 Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 4,0,1,1,1 for x=0,1,2,3,4 0
1, 9, 68, 5197, 720447, 337295264, 529968166606, 2583340386672393 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Every 0 is next to 0 4's, every 1 is next to 1 0's, every 2 is next to 2 1's, every 3 is next to 3 1's, every 4 is next to 4 1's
Diagonal of A197431
LINKS
EXAMPLE
Some solutions containing all values 0 to 4 for n=4
..2..1..0..1....1..0..0..0....1..2..0..0....0..1..2..0....1..3..1..0
..1..4..1..1....1..3..1..2....0..1..1..1....1..4..1..0....0..1..4..1
..0..1..1..0....0..1..4..1....0..1..4..1....3..1..1..0....0..2..1..3
..0..1..3..1....0..2..1..0....1..3..1..0....1..0..1..1....0..0..0..1
CROSSREFS
Sequence in context: A024119 A348590 A120306 * A089379 A193698 A188800
KEYWORD
nonn
AUTHOR
R. H. Hardin Oct 14 2011
STATUS
approved

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Last modified May 24 15:28 EDT 2024. Contains 372778 sequences. (Running on oeis4.)