A004643
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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A274496 → basis A013610
(match row sums)
1 · 2 · 4, 6 · 8, 12 … row sums 1, 2, 10, 20, 100, 200, 1000, 2000, …