A142075
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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A142075: Triangle T(n, k) = 2^(k-1) * E(n, k-1) where E(n,k) are the Eulerian numbers A173018, read by rows.
(identification, match triangle)
1 · 1, 2 · 1, 8, 4 · 1, 22, 44, 8 … row sums 1, 3, 13, 75, 541, 4683, 47293, 545835, …