A052690
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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A225470 → basis A013610
(match row sums)
1 · 3, 3 · 18, 27, 9 · 162, 297, 162, 27 … row sums 1, 6, 54, 648, 9720, 174960, 3674160, …
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A286718 → basis A013611
(match row sums)
1 · 2, 4 · 10, 28, 16 · 80, 264, 240, 64 … row sums 1, 6, 54, 648, 9720, 174960, 3674160, …
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A156992 → basis A007318
(match row sums)
1 · 4, 2 · 24, 24, 6 · 192, 288, 144, 24 … row sums 1, 6, 54, 648, 9720, 174960, 3674160, …
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A257620: Triangle read by rows: T(n, k) = t(n-k, k), where t(0,0) = 1, t(n,m) = 0 if n < 0 or m < 0, else t(n,m) = f(m)*t(n-1,m) + f(n)*t(n,m-1), and f(n) = 3*n + 3.
(match row sums)
1 · 3, 3 · 9, 36, 9 · 27, 297, 297, 27 … row sums 1, 6, 54, 648, 9720, 174960, 3674160, …