21339318

Appears in sequences

• Triangle read by rows: T(n,k) = (2 * (binomial(n,k)) * (n + 2 * k + 3)!)/((k + 1)! * (k + 2)! * (n + 3)!).at n=34A087727
• Reduced denominators of the (2n-1)th raw moment of the distribution of line lengths of points picked at random in a unit square.at n=9A103305