A139548
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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A139548: Triangle T(n,k) with the coefficient of [x^k] of the polynomial (2*(x+1)^2)^n in row n, column k, 0<=k<=2n.
(identification, match reversed triangle, match triangle)
1 · 2, 4, 2 · 4, 16, 24, 16, 4 … row sums 1, 8, 64, 512, 4096, 32768, 262144, …