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例子
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a(2)=2到a(5)=19个多集分区:
{{1,1}} {{1,1,1}} {{1,1,1,1}} {{1,1,1,1,1}}
{{1,2}} {{1,1,2}} {{1,1,1,2}} {{1,1,1,1,2}}
{{1,2,3}} {{1,1,2,2}} {{1,1,1,2,2}}
{{1,1,2,3}} {{1,1,1,2,3}}
{{1,2,3,4}}{1,1,2,2,3}}
{{1,1},{1,1}} {{1,1,2,3,4}}
{{1,1},{1,2}} {{1,2,3,4,5}}
{{1,2},{1,3}} {{1,1},{1,1,1}}
{{1,1},{1,2}}
{{1,1},{1,2,2}}
{{1,1},{1,2,3}}
{{1,2},{1,1,1}}
{{1,2},{1,1,3}}
{{1,2},{1,3,4}}
{{1,3},{1,1,2}}
{{1,3},{1,2,2}}
{{1,3},{1,2,4}}
{{1,4},{1,2,3}}
{{2,3},{1,1,2}}
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