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A230646
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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)
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0
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0, 3, 3, 123, 1635, 337977, 31908483, 40860127671, 24818871787539, 201844710508818147, 781457119775191627041, 40464088148356899296269059, 997750456877626717987299707229
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