Using a combination of black square tiles and oblong tiles chosen from: red tiles measuring two units, green tiles measuring three units, and blue tiles measuring four units, it is possible to tile a row measuring five units in length in exactly fifteen different ways.
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How many ways can a row measuring fifty units in length be tiled?
NOTE: This is related to problem 116.
These problems are part of Project Euler and are licensed under CC BY-NC-SA 2.0 UK