A003168

Sequences linked to this entry ?

• A102537: Triangle T(n,k) read by rows: (1/n) * C(2n+k,k-1) * C(n,k); n, k >= 1. match row sums
  1 · 1, 3 · 1, 8, 12 · 1, 15, 55, 55 … Σ 1, 4, 21, 126, 818, 5594, 39693, …
  (−∞, 0)nonnegative
• A243662: Triangle read by rows: the reversed x = 1+q Narayana triangle at m=2. match row sums
  1 · 3, 1 · 12, 8, 1 · 55, 55, 15, 1 … Σ 1, 4, 21, 126, 818, 5594, 39693, …
  (−∞, −1]nonnegative