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A219972
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Number of tilings of an 8 X n rectangle using straight (3 X 1) trominoes and 2 X 2 tiles.
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2
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1, 0, 4, 19, 70, 456, 2530, 12343, 66653, 372429, 1910822, 10162059, 55583124, 291195073, 1550518247, 8363883923, 44269140576, 235940940726, 1264437357202, 6723179849519, 35846240541026, 191571690239220, 1020536749613565, 5442225134864810, 29051213879574079
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