A264120
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 → 2D+1+2n → Veronese 2
(match row sums)
1 · 2 · 0, 5 · 0, 6 … row sums 1, 2, 5, 6, 9, 10, 13, 14, …