Number of set partitions of {1,2,...,n} such that the size of the smallest block is unique and it contains the element 1.

A224244

Number of set partitions of {1,2,...,n} such that the size of the smallest block is unique and it contains the element 1.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =2a(4) =9a(5) =17a(6) =63a(7) =261a(8) =1088a(9) =4374a(10) =24583a(11) =133861a(12) =740303a(13) =4514824a(14) =29945555a(15) =205127474a(16) =1464586617a(17) =10971233035a(18) =86410874373a(19) =708423380237

External references