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A195963
Number of n X n 0..4 arrays with each element equal to the number of its horizontal and vertical neighbors equal to itself
0
1, 1, 5, 21, 193, 746, 13302, 230806, 8567404, 292294619
OFFSET
1,3
COMMENTS
Diagonal of A195969
EXAMPLE
Some solutions for n=4
..2..2..2..2....1..0..1..1....0..2..2..2....0..1..1..0....2..2..2..0
..2..0..1..2....1..2..2..0....2..2..1..2....2..2..2..2....2..1..2..1
..2..2..1..2....0..2..2..1....2..0..1..2....2..1..1..2....2..1..2..1
..0..2..2..2....1..1..0..1....2..2..2..2....2..2..2..2....2..2..2..0
CROSSREFS
Sequence in context: A123334 A140196 A027160 * A119686 A241467 A267020
KEYWORD
nonn
AUTHOR
R. H. Hardin Sep 25 2011
STATUS
approved