A055271
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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A207607 → basis A013609
(match row sums)
1 · 3, 4 · 8, 18, 8 · 21, 66, 60, 16 … row sums 1, 7, 34, 163, 781, 3742, 17929, 85903, …