A104934
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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A122542 → x ↦ x+1
(match row sums)
1 · 1, 1 · 3, 4, 1 · 7, 13, 7, 1 … row sums 1, 2, 8, 28, 100, 356, 1268, 4516, …