A225477
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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A286718 → basis A013610
(match triangle)
1 · 2, 3 · 10, 21, 9 · 80, 198, 135, 27 … row sums 1, 5, 40, 440, 6160, 104720, 2094400, …