A038221
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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A038221: Triangle whose (i,j)-th entry is binomial(i,j)*3^(i-j)*3^j.
(identification, match reversed triangle, match triangle)
1 · 3, 3 · 9, 18, 9 · 27, 81, 81, 27 … row sums 1, 6, 36, 216, 1296, 7776, 46656, …