A135503
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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A010054 → reverse → D
(match row sums)
3 · 0, 12 · 0, 0, 30 · 0, 0, 0, 60 … row sums 0, 3, 12, 30, 60, 105, 168, 252, …