545580

Appears in sequences

• Triangle read by rows: T(n,k) = Sum_{i=k..n} i!*Stirling2(n,i), n >= 1, 1 <= k <= n.at n=30A084416
• Triangle read by rows: T(n,k)=sum((n+1-i)!*stirling2(n,n+1-i),i=1..k), n>=1, 1<=k<=n.at n=33A084417
• Number of preferential arrangements of n labeled elements when at least k=three ranks are required.at n=8A102232