a(3)=1到a(6)=9个无循环邻接的自互补集分区:
{{1}{2}{3}} {{13}{24}} {{14}{25}{3}} {{135}{246}}
{{1}{2}{3}{4}} {{1}{24}{3}{5}} {{13}{25}{46}}
{{1}{2}{3}{4}{5}} {{14}{25}{36}}
{{1}{24}{35}{6}}
{{13}{2}{46}{5}}
{{14}{2}{36}{5}}
{{15}{26}{3}{4}}
{{1}{25}{3}{4}{6}}
{{1}{2}{3}{4}{5}{6}}
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