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A197161
Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 3,2,1,4,0 for x=0,1,2,3,4
0
1, 5, 66, 2573, 331406, 135820428, 178698032203, 752158409985973, 10105549470186567265
OFFSET
1,2
COMMENTS
Every 0 is next to 0 3's, every 1 is next to 1 2's, every 2 is next to 2 1's, every 3 is next to 3 4's, every 4 is next to 4 0's
Diagonal of A197167
EXAMPLE
Some solutions for n=4
..0..0..0..1....1..2..0..0....0..0..0..0....0..0..0..1....1..2..1..1
..2..1..1..2....0..1..0..0....0..0..1..0....1..0..0..2....0..0..1..2
..1..0..0..0....1..0..0..0....1..1..2..0....2..1..0..1....0..0..1..0
..1..2..1..0....2..1..0..0....2..1..0..0....0..0..0..0....0..0..2..1
CROSSREFS
Sequence in context: A209935 A156597 A059489 * A059852 A057171 A185230
KEYWORD
nonn
AUTHOR
R. H. Hardin Oct 10 2011
STATUS
approved