A179900
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.
-
A179900: Triangle T(n,k) read by rows: coefficient of [x^k] of the polynomial p_n(x)=(5-x)*p_{n-1}(x)-p_{n-2}(x), p_0=1, p_1=5-x.
(identification, match triangle)
1 · 5, -1 · 24, -10, 1 · 115, -73, 15, -1 … row sums 1, 4, 15, 56, 209, 780, 2911, 10864, …