11988900

Appears in sequences

• A(n,k) = Sum_{j=0..n} (k*n)!/(j! * (n-j)!)^k, square array A(n,k) read by antidiagonals, for n >= 0, k >= 0.at n=32A306641
• a(n) = Sum_{k=0..n} (3*n)!/(k! * (n-k)!)^3.at n=4A306642