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A197310 Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 0,1,1,0,0 for x=0,1,2,3,4 0
1, 0, 5, 160, 1033, 24704, 2241018, 282284587, 82874179361 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,3
COMMENTS
Every 0 is next to 0 0's, every 1 is next to 1 1's, every 2 is next to 2 1's, every 3 is next to 3 0's, every 4 is next to 4 0's
Diagonal of A197317
LINKS
EXAMPLE
Some solutions for n=4
..0..1..1..0....0..1..1..0....0..1..1..2....2..1..1..2....2..1..1..2
..1..2..2..1....1..2..0..1....1..2..0..1....1..2..2..1....1..2..2..1
..1..2..2..1....1..0..2..1....1..2..2..1....1..0..2..1....1..2..0..1
..2..1..1..2....2..1..1..0....0..1..1..2....2..1..1..2....0..1..1..2
CROSSREFS
Sequence in context: A208170 A088694 A208583 * A266525 A085330 A222628
KEYWORD
nonn
AUTHOR
R. H. Hardin Oct 13 2011
STATUS
approved

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Last modified July 14 20:49 EDT 2024. Contains 374323 sequences. (Running on oeis4.)