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A197343
Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 3,3,1,1,0 for x=0,1,2,3,4
0
1, 1, 18, 441, 17577, 2036994, 617973077, 434261782615, 734428231903592
OFFSET
1,3
COMMENTS
Every 0 is next to 0 3's, every 1 is next to 1 3's, every 2 is next to 2 1's, every 3 is next to 3 1's, every 4 is next to 4 0's
Diagonal of A197350
EXAMPLE
Some solutions containing all values 0 to 4 for n=4
..0..0..2..1....0..0..0..0....0..1..3..1....0..0..0..0....1..2..0..0
..0..0..1..3....0..0..4..0....0..0..1..2....0..4..0..0....3..1..0..0
..0..4..0..1....2..1..0..0....0..4..0..0....0..0..1..2....1..0..4..0
..0..0..0..0....1..3..1..0....0..0..0..0....0..1..3..1....0..0..0..0
CROSSREFS
Sequence in context: A005477 A361549 A326368 * A289941 A254211 A086501
KEYWORD
nonn
AUTHOR
R. H. Hardin Oct 13 2011
STATUS
approved