Number of proper partitions of a set of n labeled elements.

A008827

Number of proper partitions of a set of n labeled elements.

Terms

    a(0) =0a(1) =3a(2) =13a(3) =50a(4) =201a(5) =875a(6) =4138a(7) =21145a(8) =115973a(9) =678568a(10) =4213595a(11) =27644435a(12) =190899320a(13) =1382958543a(14) =10480142145a(15) =82864869802a(16) =682076806157

External references