A257614
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.
-
A257614: Triangle read by rows: T(n, k) = t(n-k, k), where t(0,0) = 1, t(n,m) = 0 if n < 0 or m < 0, else t(n,m) = f(m)*t(n-1,m) + f(n)*t(n,m-1), and f(n) = 5*n + 2.
(identification, match reversed triangle, match triangle)
1 · 2, 2 · 4, 28, 4 · 8, 244, 244, 8 … row sums 1, 4, 36, 504, 9576, 229824, 6664896, …