A038296
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 → basis A013610
(match reversed triangle)
1 · 6, 9 · 36, 108, 81 · 216, 972, 1458, 729 … row sums 1, 15, 225, 3375, 50625, 759375, …