a(6)=3可解己糖具有独特的解决方案:
+---+ +---+---+ +---+---+
| 1 | | 1 | 2 | | 2 | 1 |
+---+---+ +---+---+---+ +---+---+---+
| 2 | 1 | | 2 | 3 | 1 | | 3 | 2 | 1 |
+---+---+---+ +---+---+---+ +---+---+---+
| 3 | 2 | 1 | | 1 | | 1 |
+---+---+---+ +---+ +---+
a(7)=10,因为有10个七肽类至少有一个解决one Up难题的方案。
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