Triangular array where T(n,k) is the number of set partitions of n with k atomic parts.

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =2a(5) =1a(6) =6a(7) =5a(8) =3a(9) =1a(10) =22a(11) =16a(12) =9a(13) =4a(14) =1a(15) =92a(16) =60a(17) =31a(18) =14a(19) =5a(20) =1a(21) =426a(22) =252a(23) =120a(24) =52a(25) =20a(26) =6a(27) =1a(28) =2146a(29) =1160