138445

Appears in sequences

• Partial sums of the binomial coefficients binomial(3*n,n) (A005809).at n=7A188675
• Square array T(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where T(n,k) = Sum_{j=0..n} binomial(k*j,j).at n=62A358146