A047657
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.
-
A142461: Triangle read by rows: T(n,k) (1 <= k <= n) given by T(n, 1) = T(n,n) = 1, otherwise T(n, k) = (m*n-m*k+1)*T(n-1,k-1) + (m*k-m+1)*T(n-1,k), where m = 6.
(match row sums)
1 · 1, 1 · 1, 14, 1 · 1, 111, 111, 1 … row sums 1, 2, 16, 224, 4480, 116480, 3727360, …