A101280
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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A101280: Triangle T(n,k) (n >= 1, 0 <= k <= floor((n-1)/2)) read by rows, where T(n,k) = (k+1)T(n-1,k) + (2n-4k)T(n-1,k-1).
(identification, match triangle)
A008292 → γ (shift +1)1 · 1 · 1, 2 · 1, 8 … row sums 1, 1, 3, 9, 39, 189, 1107, 7281, …
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A008292 → γ
(match triangle)
1 · 1 · 1, 2 · 1, 8 … row sums 1, 1, 3, 9, 39, 189, 1107, 7281, …