A007318

View A007318 at the OEIS

identification: the entry's rule defines the sequence for every index; tail: the sequence is the entry's tail after some prefix rows; match_*: finite agreement only.

• A007318: Binomial (identification, match reversed triangle, match triangle)
  1 · 1, 1 · 1, 2, 1 · 1, 3, 3, 1 … row sums 1, 2, 4, 8, 16, 32, 64, 128, …
  A007318 (−∞, −1] nonnegative rational roots
• Riordan array (1-x,x/(1-x)). (match reversed triangle, match triangle)
  0, 0, 1 · 0, 0, 1, 1 · 0, 0, 1, 2, 1 … row sums 1, 2, 4, 8, 16, 32, 64, 128, …
  (−∞, 0] nonnegative rational roots
• basis-map coefficients of A026729 → basis A007318 (match reversed triangle, match triangle)
  1 · 1, 1 · 1, 2, 1 · 1, 3, 3, 1 … row sums 1, 2, 4, 8, 16, 32, 64, 128, …
  (−∞, −1] nonnegative rational roots