A033991
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 → 2D+1+2n → D
(match row sums)
3 · 4, 10 · 0, 12, 21 · 0, 0, 24, 36 … row sums 0, 3, 14, 33, 60, 95, 138, 189, …