A003946

View A003946 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.

• A159854 → x ↦ x+1 (match row sums)
  1, 2, 1 · 2, 5, 4, 1 · 4, 12, 13, 6, 1 … row sums 4, 12, 36, 108, 324, 972, 2916, 8748, …
  (−∞, −1] nonnegative rational roots
• A038207 → Pₙ + Pₙ₊₁ (match row sums)
  3, 1 · 6, 5, 1 · 12, 16, 7, 1 · 24, 44, 30, 9, 1 … row sums 4, 12, 36, 108, 324, 972, 2916, 8748, …
  (−∞, ∞) nonnegative rational roots
• A120909 → Pₙ + Pₙ₊₁ (match row sums)
  6, 6 · 6, 18, 12 · 6, 30, 48, 24 … row sums 12, 36, 108, 324, 972, 2916, 8748, …
  (−∞, ∞) nonnegative rational roots
• A120910 → Pₙ + Pₙ₊₁ (match row sums)
  9, 3 · 18, 15, 3 · 36, 48, 21, 3 · 72, 132, 90, 27, 3 … row sums 12, 36, 108, 324, 972, 2916, 8748, …
  (−∞, ∞) nonnegative rational roots
• A013609 → Pₙ + Pₙ₊₁ (match row sums)
  2, 2 · 2, 6, 4 · 2, 10, 16, 8 · 2, 14, 36, 40, 16 … row sums 4, 12, 36, 108, 324, 972, 2916, 8748, …
  (−∞, ∞) nonnegative rational roots