Number T(n,k) of colored set partitions of [n] where exactly k colors are used for the elements; triangle T(n,k), n>=0, 0<=k<=n, read by rows.

A323099

Number T(n,k) of colored set partitions of [n] where exactly k colors are used for the elements; triangle T(n,k), n>=0, 0<=k<=n, read by rows.

Terms

    a(0) =1a(1) =0a(2) =1a(3) =0a(4) =2a(5) =4a(6) =0a(7) =5a(8) =30a(9) =30a(10) =0a(11) =15a(12) =210a(13) =540a(14) =360a(15) =0a(16) =52a(17) =1560a(18) =7800a(19) =12480a(20) =6240a(21) =0a(22) =203a(23) =12586a(24) =109620a(25) =316680a(26) =365400a(27) =146160a(28) =0a(29) =877

External references