A357613
Sequences linked to this entry ?
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A357613: Triangle read by rows T(n, k) = binomial(2*n, k) * binomial(3*n - k, 2*n).
identification, match triangle
1 · 3, 2 · 15, 20, 6 · 84, 168, 105, 20 … Σ 1, 5, 41, 377, 3649, 36365, 369305, …