1042470

Appears in sequences

• a(n) = n^2*binomial(2*n-2, n-1).at n=9A037966
• Number of set partitions of [n] with maximal block length multiplicity equal to eight.at n=7A271737
• Triangle read by rows: T(n,k) = binomial(n,k)^2 * binomial(2*(n-k), n-k).at n=46A318397