A358735
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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A358735: Triangular array read by rows. T(n, k) is the coefficient of x^k in a(n+3) where a(1) = a(2) = a(3) = 1 and a(m+2) = (m*x + 2)*a(m+1) - a(m) for all m in Z.
(identification, match triangle)
1 · 1, 1 · 1, 4, 2 · 1, 10, 16, 6 … row sums 1, 2, 7, 33, 191, 1304, 10241, 90865, …