A079510

Sequences linked to this entry ?

• A079510: Triangle T(n,k) read by rows; related to number of preorders. identification, match triangle
  1 · 0, 2 · 0, 3, 6 · 0, 0, 20, 24 … Σ 1, 2, 9, 44, 265, 1854, 14833, 133496, …
  (−∞, 0]nonnegative