A123202
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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A123202: Triangle of coefficients of n!*(1 - x)^n*L_n(x/(1 - x)), where L_n(x) is the Laguerre polynomial.
(identification, match triangle)
1 · 1, -2 · 2, -8, 7 · 6, -36, 63, -34 … row sums 1, -1, 1, -1, 1, -1, 1, -1, …