A108520
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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A063967 → x ↦ x−4
(match row sums)
1 · -3, 1 · 6, -5, 1 · -9, 15, -7, 1 … row sums 1, -2, 2, 0, -4, 8, -8, 0, …
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A099040 → x ↦ x−2
(match row sums)
1 · -4, 2 · 12, -14, 4 · -32, 64, -40, 8 … row sums 1, -2, 2, 0, -4, 8, -8, 0, …