A059344
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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A059344: Triangle read by rows: row n consists of the nonzero coefficients of the expansion of 2^n x^n in terms of Hermite polynomials with decreasing subscripts.
(identification, match triangle)
1 · 1 · 1, 2 · 1, 6 … row sums 1, 1, 3, 7, 25, 81, 331, 1303, …