A091044
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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A091044: One half of odd-numbered entries of even-numbered rows of Pascal's triangle A007318.
(identification, match reversed triangle, match triangle)
1 · 2, 2 · 3, 10, 3 · 4, 28, 28, 4 … row sums 1, 4, 16, 64, 256, 1024, 4096, 16384, …