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A195227
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Number of lower triangles of an n X n 0..3 array with each element differing from all of its diagonal, vertical, antidiagonal and horizontal neighbors by one or less
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1
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4, 22, 246, 5428, 237818, 20729610, 3601738548, 1249159521262, 865793424024974, 1200356073563114252, 3331551471246807302142, 18523112376180844925948966, 206425939461681776649215679048, 4613382950875473008207859661034814
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