A045991
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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A023531 → (θ+1)² → D
(match row sums)
4 · 0, 18 · 0, 0, 48 · 0, 0, 0, 100 … row sums 0, 4, 18, 48, 100, 180, 294, 448, …