Root regions
Nodes grouped by the interval that contains every root of every row (proved, for all n). A node can have several proved regions; the sharpest is the smallest interval.
Nodes with all roots in (3, 7] (3)
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A113214 → x ↦ x−7
1 · -5, 1 · 28, -11, 1 · -161, 93, -17, 1 … row sums 1, -4, 18, -84, 396, -1872, 8856, …
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A063967 → x ↦ x−8
1 · -7, 1 · 42, -13, 1 · -245, 119, -19, 1 … row sums 1, -6, 30, -144, 684, -3240, 15336, …
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A030528 → x ↦ x−7
1 · -6, 1 · 35, -12, 1 · -203, 106, -18, 1 … row sums 1, -5, 24, -114, 540, -2556, 12096, …