3864861

Appears in sequences

• a(n) = binomial(n+5, 5) * binomial(n+7, 5).at n=8A107396
• Binomial(n-k-1,k) * binomial(n-k,k+1) where k = ceiling(n/4).at n=19A171006
• Triangle read by rows. T(n, k) = (n - k + 1) * binomial(n + k + 1, 2*k)^2 / (n + k + 1).at n=49A370233