Number T(n,k) of colored set partitions of [n] where elements of subsets have distinct colors and exactly k colors are used; triangle T(n,k), n>=0, 0<=k<=n, read by rows.
A323128
Number T(n,k) of colored set partitions of [n] where elements of subsets have distinct colors and exactly k colors are used; triangle T(n,k), n>=0, 0<=k<=n, read by rows.
Terms
- a(0) =1a(1) =0a(2) =1a(3) =0a(4) =1a(5) =4a(6) =0a(7) =1a(8) =18a(9) =30a(10) =0a(11) =1a(12) =74a(13) =360a(14) =360a(15) =0a(16) =1a(17) =310a(18) =3450a(19) =8880a(20) =6240a(21) =0a(22) =1a(23) =1382a(24) =31770a(25) =160080a(26) =271800a(27) =146160a(28) =0a(29) =1
External references
- oeis: A323128