42687960

Appears in sequences

• 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.at n=40A323128
• Number of colored set partitions of [2n] where elements of subsets have distinct colors and exactly n colors are used.at n=4A324523