ドゥブリュエイン列:3シンボルの3文字単語の場合 Graph G : 1 1 1 0 0 0 0 0 0 0 0 0 1 1 1 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 1 1 1 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 1 1 1 0 0 0 0 0 0 0 0 0 1 1 1 Eulerian Circuit : 00 -> 00 -> 01 -> 10 -> 00 -> 02 -> 20 -> 01 -> 11 -> 10 -> 01 -> 12 -> 20 -> 02 -> 21 -> 10 -> 02 -> 22 -> 21 -> 11 -> 11 -> 12 -> 21 -> 12 -> 22 -> 22 -> 20 -> 00 De Bruijn sequence : 00010020110120210221112122200