A014531
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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narayana → γ (shift +1) → D
(match row sums)
1 · 3 · 6, 4 · 10, 20 … row sums 0, 0, 1, 3, 10, 30, 90, 266, …