A122690
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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A122542 → basis A013610
(match row sums)
1 · 1, 3 · 3, 12, 9 · 7, 39, 63, 27 … row sums 1, 4, 24, 136, 776, 4424, 25224, …