A391533
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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A391533: The truncated (4,4,1)-Pascal triangle, given by 4*C(n-2, k) + 4*C(n-2, k-1) + C(n-2, k-2) for n>=2.
(identification, match triangle)
4, 4, 1 · 4, 8, 5, 1 · 4, 12, 13, 6, 1 … row sums 9, 18, 36, 72, 144, 288, 576, 1152, …
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A391533 → reverse
(match reversed triangle)
1, 4, 4 · 1, 5, 8, 4 · 1, 6, 13, 12, 4 … row sums 9, 18, 36, 72, 144, 288, 576, 1152, …