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A196712
Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 4,0,2,1,3 for x=0,1,2,3,4
0
1, 6, 40, 1142, 56137, 9202067, 3464871506, 3526366342860
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 2's, every 3 is next to 3 1's, every 4 is next to 4 3's
Diagonal of A196718
EXAMPLE
Some solutions for n=4
..0..0..0..1....2..2..0..0....2..2..2..1....1..0..0..1....1..0..1..1
..1..3..1..3....2..2..1..1....2..0..2..0....1..1..1..1....3..1..1..0
..3..1..1..1....0..1..1..3....2..2..2..0....0..1..3..0....1..1..1..0
..1..0..0..0....1..1..0..1....0..0..0..0....0..1..1..0....0..0..1..1
CROSSREFS
Sequence in context: A196478 A001367 A096671 * A086803 A136382 A096716
KEYWORD
nonn
AUTHOR
R. H. Hardin Oct 05 2011
STATUS
approved