A028421
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.
-
A132393 → D
(match triangle)
1 · 1, 2 · 2, 6, 3 · 6, 22, 18, 4 … row sums 0, 1, 3, 11, 50, 274, 1764, 13068, …
-
A130534 → θ+1
(match triangle)
1 · 1, 2 · 2, 6, 3 · 6, 22, 18, 4 … row sums 1, 3, 11, 50, 274, 1764, 13068, 109584, …