170520

Appears in sequences

• Number of white corners in all permutations of {1,2,...,n} (for definition see the Eriksson-Linusson references).at n=7A140712
• Square array read by antidiagonals: T(n,k) is the number of k-edge colored trees on vertex set [n] (n>=2, k>=2).at n=39A248090
• Triangular array: row n gives the coefficients of the polynomial p(n,x) defined in Comments.at n=38A249247