4420080

Appears in sequences

• a(n) = n! * A000110(n) where A000110 is the sequence of Bell numbers.at n=7A137341
• 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.at n=35A323099
• 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=35A323128
• Triangle read by rows. T(n, k) = n! * BellPolynomial(n, k).at n=29A350259