A027327
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.
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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, …
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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, …