A171631
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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A007318 → D → θ+1
(match reversed triangle)
1 · 2, 4 · 3, 12, 9 · 4, 24, 36, 16 … row sums 0, 1, 6, 24, 80, 240, 672, 1792, …
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A007318 → D → D+1
(match triangle)
1 · 4, 2 · 9, 12, 3 · 16, 36, 24, 4 … row sums 0, 1, 6, 24, 80, 240, 672, 1792, …