A015528
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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A081580 → basis A007318
(match row sums)
1 · 2, 1 · 9, 9, 1 · 28, 42, 16, 1 … row sums 1, 3, 19, 87, 451, 2223, 11179, 55767, …
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A081580 → x ↦ x/(x+1)
(match row sums)
1 · 1, 2 · 1, 9, 9 · 1, 16, 42, 28 … row sums 1, 3, 19, 87, 451, 2223, 11179, 55767, …