A115327
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 → basis A013609
(match row sums)
1 · 1 · 2, 2 · 4, 6 … row sums 1, 1, 4, 10, 46, 166, 856, 3844, …