A001870
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.
-
A085478 → D
(match row sums)
1 · 3, 2 · 6, 10, 3 · 10, 30, 21, 4 … row sums 0, 0, 1, 5, 19, 65, 210, 654, …