Regular triangle read by rows where T(n,k) is the number of set partitions of {1,...,n} with k topologically connected components.

A324173

Regular triangle read by rows where T(n,k) is the number of set partitions of {1,...,n} with k topologically connected components.

Terms

    a(0) =1a(1) =0a(2) =1a(3) =0a(4) =1a(5) =1a(6) =0a(7) =1a(8) =3a(9) =1a(10) =0a(11) =2a(12) =6a(13) =6a(14) =1a(15) =0a(16) =6a(17) =15a(18) =20a(19) =10a(20) =1a(21) =0a(22) =21a(23) =51a(24) =65a(25) =50a(26) =15a(27) =1a(28) =0a(29) =85

External references