A020707
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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basis-map coefficients of A112227 → x ↦ x+1
(match row sums)
1, 2, 1 · 1, 3, 3, 1 · 1, 4, 6, 4, 1 … row sums 4, 8, 16, 32, 64, 128, 256, 512, …