A258758

Sequences linked to this entry ?

• A258758: Triangle T(n,k) = C(n+k-1,k)*C(2*n-1,n-k). identification, match reversed triangle, match triangle
  1 · 1, 1 · 3, 6, 3 · 10, 30, 30, 10 … Σ 1, 2, 12, 80, 560, 4032, 29568, 219648, …
  (−∞, 0)nonnegativerational roots