127400

Appears in sequences

• Number triangle T(n,k) = binomial(n,k)*binomial(2n,n-k).at n=40A110608
• Triangle T(n,k) = binomial(2*n,k) *binomial(2*n-2*k,n-k), read by rows; 0<=k<=n.at n=40A142243
• Number of 3-turn rook's tours on an n X n board summed over all starting positions.at n=13A187190
• a(n) = n*(2*n+1)*binomial(n+2,n)/3.at n=24A289643
• Numbers k such that k | A328258(k).at n=6A348584
• Table read by rows: T(n, k) = binomial(n, k) * fibonomial(n, k).at n=40A385626