A257625
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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A257625: Triangle read by rows: T(n, k) = t(n-k, k), where t(0,0) = 1, t(n,m) = 0 if n < 0 or m < 0, else t(n,m) = f(m)*t(n-1,m) + f(n)*t(n,m-1), and f(n) = 6*n + 3.
(identification, match reversed triangle, match triangle)
1 · 3, 3 · 9, 54, 9 · 27, 621, 621, 27 … row sums 1, 6, 72, 1296, 31104, 933120, …