A219512
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.
-
A219512: Triangle of third-order Eulerian numbers: 3-Stirling permutations enumerated by ascents.
(identification, match triangle)
1 · 1, 3 · 1, 12, 15 · 1, 33, 141, 105 … row sums 1, 4, 28, 280, 3640, 58240, 1106560, …