A207823
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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A207823: Triangle of coefficients of Chebyshev's S(n,x+4) polynomials (exponents of x in increasing order).
(identification, match triangle)
1 · 4, 1 · 15, 8, 1 · 56, 46, 12, 1 … row sums 1, 5, 24, 115, 551, 2640, 12649, 60605, …
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A207823 → reverse
(match reversed triangle)
1 · 1, 4 · 1, 8, 15 · 1, 12, 46, 56 … row sums 1, 5, 24, 115, 551, 2640, 12649, 60605, …