Linear OA(4¹⁸⁰, 4899, F₄, 37) (dual of [4899, 4719, 38]-code), using 786 step VarÅ¡amov–Edel lengthening with (r_i) = (3, 1, 1, 1, 0, 0, 1, 5 times 0, 1, 8 times 0, 1, 14 times 0, 1, 22 times 0, 1, 35 times 0, 1, 52 times 0, 1, 75 times 0, 1, 102 times 0, 1, 130 times 0, 1, 154 times 0, 1, 172 times 0) based on linear OA(4¹⁶³, 4096, F₄, 37) (dual of [4096, 3933, 38]-code), using

• an extension C_e(36) of the primitive narrow-sense BCH-code C(I) with length 4095 = 4⁶−1, defining interval I = [1,36], and designed minimum distance d ≥ |I|+1 = 37 [i]