A006157
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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type_b_eulerian → γ (scale 1/4) → D
(match row sums)
1 · 5 · 18, 10 · 58, 122 … row sums 0, 0, 1, 5, 28, 180, 1320, 10920, …