A390887
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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A023531 → basis A049020 → x ↦ x/(x+1)
(match row sums)
1 · 1, 2 · 2, 7, 6 · 5, 25, 41, 22 … row sums 1, 3, 15, 93, 681, 5691, 53079, 544053, …