A000245

Sequences linked to this entry ?

• A119308: Triangle for first differences of Catalan numbers. match row sums
  1 · 2, 1 · 3, 5, 1 · 4, 14, 9, 1 … Σ 1, 3, 9, 28, 90, 297, 1001, 3432, …
  (−∞, 0)nonnegative