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A266311
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Number of 4Xn arrays containing n copies of 0..4-1 with no element 1 greater than its west neighbor modulo 4 and the upper left element equal to 0.
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1
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6, 171, 8190, 442285, 25839438, 1605405629, 103948820622, 6930557596953, 472599444039774, 32808183003171211, 2310785736121024350, 164716310371150628603, 11860112155495496736974, 861339905567424795731145
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