A152842
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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A152842: Triangle T(n,k), 0 <= k <= n, read by rows, given by [1,0,-1,0,0,0,0,0,0,...] DELTA [3,-2,-1,0,0,0,0,0,0,...] where DELTA is the operator defined in A084938.
(identification, match triangle)
1 · 1, 3 · 1, 4, 3 · 1, 7, 15, 9 … row sums 1, 4, 8, 32, 64, 256, 512, 2048, …
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A152842 → reverse
(match reversed triangle)
1 · 3, 1 · 3, 4, 1 · 9, 15, 7, 1 … row sums 1, 4, 8, 32, 64, 256, 512, 2048, …