A085880
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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A085880: Triangle T(n,k) read by rows: multiply row n of Pascal's triangle (A007318) by the n-th Catalan number (A000108).
(identification, match reversed triangle, match triangle)
1 · 1, 1 · 2, 4, 2 · 5, 15, 15, 5 … row sums 1, 2, 8, 40, 224, 1344, 8448, 54912, …