A144442
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.
-
A144442: Triangle read by rows: T(n, k) = (5*n-5*k+1)*T(n-1, k-1) +(5*k-4)*T(n-1, k) + 5*T(n-2, k-1) with T(n, 1) = T(n, n) = 1.
(identification, match reversed triangle, match triangle)
1 · 1, 1 · 1, 17, 1 · 1, 118, 118, 1 … row sums 1, 2, 19, 238, 4141, 92292, 2512589, …