Red, green, and blue tiles
Problem 117
Published on Friday, 10th March 2006, 06:00 pm; Solved by 6855; Difficulty rating: 35%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.


















How many ways can a row measuring fifty units in length be tiled?
NOTE: This is related to Problem 116.