A038260
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.
-
A038221 → basis A013609
(match reversed triangle, match triangle)
1 · 6, 6 · 36, 72, 36 · 216, 648, 648, 216 … row sums 1, 12, 144, 1728, 20736, 248832, …