A005011
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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Stirling2 triangle with scaled diagonals (powers of 5).
(match row sums)
25, 15, 1 · 125, 175, 30, 1 · 625, 1875, 625, 50, 1 … row sums 41, 331, 3176, 35451, 447981, 6282416, …