| 数据
|
1, 1, 3, 7, 21, 54, 165, 477, 1501, 4736, 15652
|
| 例子
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a(1)=1到a(4)=21多集分区的非同构代表:
{{1}} {{1,1}} {{1,1,1}} {{1,1,1,1}}
{{1,2}} {{1,2,2}} {{1,1,2,2}}
{{1},{2}} {{1,2,3}} {{1,2,2,2}}
{{1},{2,2}}{1,2,3}}
{{1},{2,3}} {{1,2,3,4}}
{{2},{1,2}} {{1},{1,2,2}}
{{1}、{2}、{3}}{1,1}、{2,2}}
{{1,2},{1,2}}
{{1},{2,2,2}}
{{1,2},{2,2}}
{{1},{2,3,3}}
{{1,2},{3,3}}
{{1},{2,3,4}}
{{1,2},{3,4}}
{{1,3},{2,3}}
{{2},{1,2,2}}
{{3},{1,2,3}}
{{1},{2},{3,3}}
{{1},{2},{3,4}}
{{1},{3},{2,3}}
{{1}、{2}、{3}、{4}}
|