Linear OA(3¹³⁰, 828, F₃, 30) (dual of [828, 698, 31]-code), using 87 step VarÅ¡amov–Edel lengthening with (r_i) = (3, 1, 1, 1, 0, 1, 0, 0, 0, 1, 4 times 0, 1, 7 times 0, 1, 10 times 0, 1, 13 times 0, 1, 17 times 0, 1, 21 times 0) based on linear OA(3¹¹⁷, 728, F₃, 30) (dual of [728, 611, 31]-code), using

• the primitive narrow-sense BCH-code C(I) with length 728 = 3⁶−1, defining interval I = [1,30], and designed minimum distance d ≥ |I|+1 = 31 [i]