Linear OA(4²²⁷, 4429, F₄, 49) (dual of [4429, 4202, 50]-code), using 322 step VarÅ¡amov–Edel lengthening with (r_i) = (2, 1, 0, 1, 4 times 0, 1, 9 times 0, 1, 19 times 0, 1, 34 times 0, 1, 58 times 0, 1, 83 times 0, 1, 105 times 0) based on linear OA(4²¹⁷, 4097, F₄, 49) (dual of [4097, 3880, 50]-code), using

• the expurgated narrow-sense BCH-code C(I) with length 4097 | 4¹²âˆ’1, defining interval I = [0,24], and minimum distance d ≥ |{−24,−23,…,24}|+1 = 50 (BCH-bound) [i]