A335819
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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A100861 → reverse → basis A013609
(match row sums)
1 · 1, 2 · 2, 6, 4 · 4, 18, 24, 8 … row sums 1, 3, 12, 54, 270, 1458, 8424, 51516, …