A040075
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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A178821 → basis A013609
(match row sums)
1 · 10, 10 · 60, 120, 60 · 280, 840, 840, 280 … row sums 1, 20, 240, 2240, 17920, 129024, …