A062147

Sequences linked to this entry ?

• Triangle of unsigned 2-Lah numbers. match row sums
  20, 10, 1 · 120, 90, 18, 1 · 840, 840, 252, 28, 1 … Σ 31, 229, 1961, 19081, 207775, 2501801, …
  (−∞, 0)nonnegative