A109983
Sequences linked to this entry ?
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A109983: Triangle read by rows: T(n, k) (0<=k<=2n) is the number of Delannoy paths of length n, having k steps.
identification, match triangle
1 · 0, 1, 2 · 0, 0, 1, 6, 6 · 0, 0, 0, 1, 12, 30, 20 … Σ 1, 3, 13, 63, 321, 1683, 8989, 48639, …