A060921
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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A078812 → x ↦ x/(x+1)
(match reversed triangle)
1 · 2, 3 · 3, 10, 8 · 4, 22, 38, 21 … row sums 1, 5, 21, 85, 341, 1365, 5461, 21845, …
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A172431 → basis A007318
(match triangle)
1 · 3, 2 · 8, 10, 3 · 21, 38, 22, 4 … row sums 1, 5, 21, 85, 341, 1365, 5461, 21845, …