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A252711
Number of (n+2)X(n+2) 0..3 arrays with every consecutive three elements in every row and diagonal having exactly two distinct values, and in every column and antidiagonal not having exactly two distinct values, and new values 0 upwards introduced in row major order
0
39, 46, 62, 97, 147, 262, 373, 586, 1012, 1422, 2208, 3820, 5248, 8236, 14216, 19372, 30744, 53228, 72248, 116140, 201800, 273772, 444936, 775948, 1053448, 1726732
OFFSET
1,1
COMMENTS
Diagonal of A252719
EXAMPLE
Some solutions for n=4
..0..0..1..0..0..1....0..0..1..0..0..1....0..1..0..0..1..0....0..1..1..0..1..1
..1..0..0..1..0..0....2..1..1..3..1..1....1..1..2..1..1..3....1..0..1..1..0..1
..2..0..2..2..0..2....1..2..1..1..3..1....3..1..1..2..1..1....2..2..1..2..2..1
..0..0..1..0..0..1....0..0..1..0..0..1....0..1..0..0..1..0....3..1..1..0..1..1
..3..0..0..1..0..0....2..1..1..2..1..1....1..1..3..1..1..2....1..3..1..1..0..1
..2..0..2..2..0..2....1..2..1..1..2..1....2..1..1..3..1..1....2..2..1..2..2..1
CROSSREFS
Sequence in context: A236673 A119028 A252712 * A046512 A143746 A064399
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 20 2014
STATUS
approved