A140701
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.
-
A128813 → basis A013609
(match row sums)
1 · 2, 2 · 8, 20, 12 · 56, 236, 324, 144 … row sums 1, 4, 40, 760, 23560, 1083760, …