A137338
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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A137338: Triangle read by rows: T(n,k), 0 <= k <= n, gives the coefficients of the Charlier polynomials (with parameter a=1), ordered by rising powers.
(identification, match triangle)
1 · -1, 1 · 0, -3, 1 · 3, 6, -6, 1 … row sums 1, 0, -2, 4, -4, -4, 44, -236, …