A018215
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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A034870 → D
(match row sums)
2, 2 · 4, 12, 12, 4 · 6, 30, 60, 60, 30, 6 … row sums 0, 4, 32, 192, 1024, 5120, 24576, …