A141611
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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A141611: Triangle read by rows: T(n, k) = (n-k+1)*(k+1)*binomial(n, k).
(identification, match reversed triangle, match triangle)
A007318 → −D²+(−1+n)D+1+n1 · 2, 2 · 3, 8, 3 · 4, 18, 18, 4 … row sums 1, 4, 14, 44, 128, 352, 928, 2368, …