A122076
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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A122076: Coefficients of a generalized Jaco-Lucas polynomial (even indices) read by rows.
(identification, match triangle)
2 · 3, 2 · 7, 8, 2 · 18, 30, 15, 2 … row sums 2, 5, 17, 65, 257, 1025, 4097, 16385, …