A128710
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.
-
A159854 → D
(match triangle)
0, 2 · 0, 2, 3 · 0, 2, 6, 4 · 0, 2, 9, 12, 5 … row sums 2, 5, 12, 28, 64, 144, 320, 704, …