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A196679
Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 4,0,1,2,3 for x=0,1,2,3,4
0
1, 9, 58, 2245, 188078, 39696088, 23029545105, 36239510088523
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 2's, every 4 is next to 4 3's
Diagonal of A196685
EXAMPLE
Some solutions for n=4
..1..0..0..0....1..1..1..2....0..1..2..1....0..0..2..1....0..2..1..2
..1..2..0..0....0..0..0..1....1..2..0..0....0..2..1..0....1..1..0..1
..0..1..2..0....0..0..0..1....1..2..0..0....2..1..2..0....2..1..0..1
..0..1..1..0....1..1..1..2....0..1..2..1....1..0..0..0....0..2..1..2
CROSSREFS
Sequence in context: A322207 A196293 A196211 * A276450 A276648 A308353
KEYWORD
nonn
AUTHOR
R. H. Hardin Oct 05 2011
STATUS
approved