A015521
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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A081577 → x ↦ x+1
(match row sums)
1 · 2, 1 · 6, 6, 1 · 16, 24, 10, 1 … row sums 1, 3, 13, 51, 205, 819, 3277, 13107, …
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A081577 → x ↦ x/(x+1)
(match row sums)
1 · 1, 2 · 1, 6, 6 · 1, 10, 24, 16 … row sums 1, 3, 13, 51, 205, 819, 3277, 13107, …