A144445
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.
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A144445: Triangle, read by rows, T(n,k) = (7*n-7*k+1)*T(n-1, k-2) + (7*k-6)*T(n-1, k) + 7*T(n-2, k-1) with T(n, 1) = T(n, n) = 1.
(identification, match reversed triangle, match triangle)
1 · 1, 1 · 1, 23, 1 · 1, 206, 206, 1 … row sums 1, 2, 25, 414, 9697, 293808, 10938775, …