A306364
Sequences linked to this entry ?
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A306364: Triangular array of the number of binary, rooted, leaf-labeled tree topologies with n leaves and k cherries, n >= 2, 1 <= k <= floor(n/2).
identification, match triangle
1 · 3 · 12, 3 · 60, 45 … Σ 1, 3, 15, 105, 945, 10395, 135135, …