A020699
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.
-
A028326 → basis A013610
(match row sums)
2 · 4, 6 · 8, 24, 18 · 16, 72, 108, 54 … row sums 2, 10, 50, 250, 1250, 6250, 31250, …