A013627
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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A013613 → basis A007318
(match reversed triangle)
1 · 7, 6 · 49, 84, 36 · 343, 882, 756, 216 … row sums 1, 13, 169, 2197, 28561, 371293, …