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例子
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a(2)=1到a(6)=11反链的非同构代表:
{{1,2}} {{1,2,3}} {{1,2,3,4}} {{1,2,3,4,5}} {{1,2,3,4,5,6}}
{{1,2},{3,4}} {{1,2},{3,4,5}} {{1,2},{3,4,5,6}}
{{1,3},{2,3}} {{1,4},{2,3,4}} {{1,2,3},{4,5,6}}
{{1,2,5},{3,4,5}}
{{1,3,4},{2,3,4}}
{{1,5},{2,3,4,5}}
{{1,2},{1,3},{2,3}}
{{1,2},{3,4},{5,6}}
{{1,2},{3,5},{4,5}}
{{1,3},{2,4},{3,4}}
{{1,4},{2,4},{3,4}}
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