1881050

Appears in sequences

• Triangle read by rows: T(n,k) is the number of permutations of {1,2,...,n} whose longest block is of length k (0<=k<=n).at n=57A184182
• Number of permutations of [n] whose longest block is of length 2. A block of a permutation is a maximal sequence of consecutive integers which appear in consecutive positions.at n=10A370390