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A318041
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Number of nX4 0..1 arrays with every element unequal to 0, 2, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
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1
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1, 3, 21, 140, 905, 6179, 42793, 297043, 2056698, 14234986, 98543469, 682235511, 4723208829, 32699080489, 226377712742, 1567228238886, 10850029939485, 75115505261838, 520029800880263, 3600202027360686, 24924446019234303
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