A380612
Sequences linked to this entry ?
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Triangle T(n, k) read by rows: Row n gives the coefficients of the even powers in Product_{t=1..n}(2*x - (2*t - 1))*Product_{t=1..n}(2*x + (2*t - 1)).
match row sums
16, -40, 9 · 64, -560, 1036, -225 … Σ -15, 315, -14175, 1091475, -127702575, …