A230646 Number of n X n 0..2 white square subarrays x(i,j) with each element diagonally or antidiagonally next to at least one element with value 2-x(i,j).
0, 3, 3, 123, 1635, 337977, 31908483, 40860127671, 24818871787539, 201844710508818147, 781457119775191627041, 40464088148356899296269059, 997750456877626717987299707229
Offset: 1
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Examples
Some solutions for n=5 ..0..x..0..x..2....1..x..2..x..2....0..x..0..x..1....2..x..2..x..0 ..x..2..x..0..x....x..1..x..0..x....x..2..x..1..x....x..0..x..2..x ..0..x..2..x..2....2..x..2..x..1....2..x..0..x..1....2..x..1..x..0 ..x..1..x..2..x....x..0..x..1..x....x..0..x..1..x....x..1..x..0..x ..1..x..0..x..0....2..x..1..x..1....2..x..2..x..1....1..x..1..x..2
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