a(3)=1到a(6)=15个无单例的自互补集分区:
{{123}} {{1234}} {{12345}} {{123456}}
{{12}{34}} {{135}{24}} {{123}{456}}
{{13}{24}} {{15}{234}} {{124}{356}}
{{14}{23}} {{1256}{34}}
{{1346}{25}}
{{135}{246}}
{{145}{236}}
{{16}{2345}}
{{12}{34}{56}}
{{13}{25}{46}}
{{14}{25}{36}}
{{15}{26}{34}}
{{16}{23}{45}}
{{16}{24}{35}}
{{16}{25}{34}}