A103407

View A103407 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 → D+1 → x ↦ x+1 (match reversed triangle)
  1 · 3, 1 · 8, 6, 1 · 20, 24, 9, 1 … row sums 1, 4, 15, 54, 189, 648, 2187, 7290, …
  (−∞, −1] nonnegative rational roots
• A038207 → D+1 (match reversed triangle)
  1 · 3, 1 · 8, 6, 1 · 20, 24, 9, 1 … row sums 1, 4, 15, 54, 189, 648, 2187, 7290, …
  (−∞, 0] nonnegative rational roots
• A007318 → θ+1 → x ↦ x/(x+1) (match triangle)
  1 · 1, 3 · 1, 6, 8 · 1, 9, 24, 20 … row sums 1, 4, 15, 54, 189, 648, 2187, 7290, …
  [−1, 0] nonnegative rational roots