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A267344
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Number of 4Xn arrays containing n copies of 0..4-1 with every element equal to or 1 greater than any north, west or southwest neighbors modulo 4 and the upper left element equal to 0.
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1
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1, 1, 2, 12, 45, 135, 388, 1220, 5401, 27146, 125333, 515897, 2010472, 8064508, 34936670, 159444254, 725890833, 3205348045, 13816812300, 59601118346, 262631332138, 1183293213009, 5373170070242, 24253891624959, 108483481246313
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