A049388
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.
-
A137320 → basis A013610
(match row sums)
1 · 2, 6 · 6, 30, 36 · 24, 156, 324, 216 … row sums 1, 8, 72, 720, 7920, 95040, 1235520, …
-
A257606: Triangle read by rows: T(n,k) = t(n-k, k); t(n,m) = f(m)*t(n-1,m) + f(n)*t(n,m-1), where f(x) = x + 4.
(match row sums)
1 · 4, 4 · 16, 40, 16 · 64, 296, 296, 64 … row sums 1, 8, 72, 720, 7920, 95040, 1235520, …