A129683
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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Triangle read by rows: T(n, k) = 2^n * [x^k] hypergeom([-n, -n, 1], [1], x).
(match row sums)
4, 16, 8 · 8, 72, 144, 48 · 16, 256, 1152, 1536, 384 … row sums 28, 272, 3344, 49472, 852928, 16758016, …