A267883
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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A028338 → x ↦ −2x−1 (shift -1) → Pₙ + Pₙ₊₁
(match row sums)
1, 1 · 0, 0, 1 · 0, 1, -2, 1 · 0, -4, 8, -5, 1 … row sums 2, 1, 0, 0, 0, 0, 0, 0, …