A165891
Sequences linked to this entry ?
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A165891: Irregular triangle T(n, k) = [x^k]( p(n, x) ), where p(n, x) = (1/x)*(1-x)^n*(1+x)^(n+2)*( Sum_{j >= 0} j^(n+1)*x^j ), read by rows.
identification, match reversed triangle, match triangle
1 · 1, 2, 1 · 1, 6, 10, 6, 1 … Σ 1, 4, 24, 192, 1920, 23040, 322560, …