multiset partitions (3,0)

elements in multiset: 3         integer partition: 0 (1+1+1)

1:    { 1 2 3 }
2:    { 1 }{ 2 3 }
3:    { 2 }{ 1 3 }
4:    { 3 }{ 1 2 }
5:    { 1 }{ 2 }{ 3 }