4907760

Appears in sequences

• a(n) = C(2n,n)*C(2n+2,n+1)/(n+2).at n=7A172392
• a(n) = 3*((2*n+2)!)^2 / (n!*(n+1)!*(n+2)!*(n+3)!).at n=7A227169
• Triangle read by rows: T(n, k) = binomial(2*k, k) * binomial(2*n, n) / (n + 1).at n=43A379100