ocr: DeBrujns sequences can be represented! py anecklace ofcolouredbeads, For example,ifwe: takethe three colours red, blue and green which we can designateasR, BandG, then the de Brujnsequence: RRRRBRRRGRRBBRRBGRRGBRRGGRBRBRGRBBBRBBGRBGBRBGORBGORGRGBBRGBORGGBROGGBBB BGBBGOBGEGGGGIRRR. I where the bracket 19 arepeat of the sequenceasit15( circu- lar, containsthe: 81 possible arrangements of four beads in three colours ie REURE RRRB RRRG RRBR RBB KEG RRGR RRGB REGG BRR, RBP EG RBAR RBBB RALG REGR RBGB RBGG RGRR RCRB RERG RGIR RGBB RGBO ReaR RGGB RGGG BARR RRB BRRG BEBR BRBB RBG BRER BRGB BRGG DURR B ...
