A178820
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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A178820: Triangle read by rows: T(n,k) = C(n+3,3) * C(n,k), 0 <= k <= n.
(identification, match reversed triangle, match triangle)
1 · 4, 4 · 10, 20, 10 · 20, 60, 60, 20 … row sums 1, 8, 40, 160, 560, 1792, 5376, 15360, …