A225476
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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A225476: Triangle read by rows, k!*2^k*S_2(n, k) where S_m(n, k) are the Stirling-Frobenius subset numbers of order m; n >= 0, k >= 0.
(identification, match triangle)
1 · 1, 1 · 1, 4, 2 · 1, 13, 18, 6 … row sums 1, 2, 7, 38, 277, 2522, 27547, 351038, …