A257626
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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A257626: Triangle read by rows: T(n,k) = t(n-k, k); t(n,m) = f(m)*t(n-1,m) + f(n)*t(n,m-1), where f(x) = 3*x + 6.
(identification, match reversed triangle, match triangle)
1 · 6, 6 · 36, 108, 36 · 216, 1404, 1404, 216 … row sums 1, 12, 180, 3240, 68040, 1632960, …