A027710
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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A023531 → basis A049020 → x ↦ x+1
(match row sums)
1 · 2, 1 · 6, 5, 1 · 22, 25, 9, 1 … row sums 1, 3, 12, 57, 309, 1866, 12351, 88563, …