A015548
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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A081578 → basis A013610
(match row sums)
1 · 2, 3 · 7, 21, 9 · 20, 90, 108, 27 … row sums 1, 5, 37, 245, 1669, 11285, 76453, …