Linear OA(4¹⁴⁹, 4838, F₄, 30) (dual of [4838, 4689, 31]-code), using 4688 step VarÅ¡amov–Edel lengthening with (r_i) = (8, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 4 times 0, 1, 4 times 0, 1, 4 times 0, 1, 5 times 0, 1, 5 times 0, 1, 5 times 0, 1, 5 times 0, 1, 6 times 0, 1, 7 times 0, 1, 6 times 0, 1, 7 times 0, 1, 8 times 0, 1, 8 times 0, 1, 9 times 0, 1, 9 times 0, 1, 10 times 0, 1, 10 times 0, 1, 11 times 0, 1, 11 times 0, 1, 12 times 0, 1, 13 times 0, 1, 13 times 0, 1, 14 times 0, 1, 15 times 0, 1, 16 times 0, 1, 17 times 0, 1, 18 times 0, 1, 18 times 0, 1, 20 times 0, 1, 21 times 0, 1, 22 times 0, 1, 23 times 0, 1, 24 times 0, 1, 25 times 0, 1, 27 times 0, 1, 28 times 0, 1, 30 times 0, 1, 31 times 0, 1, 33 times 0, 1, 35 times 0, 1, 36 times 0, 1, 38 times 0, 1, 40 times 0, 1, 43 times 0, 1, 44 times 0, 1, 47 times 0, 1, 49 times 0, 1, 52 times 0, 1, 54 times 0, 1, 57 times 0, 1, 60 times 0, 1, 63 times 0, 1, 66 times 0, 1, 70 times 0, 1, 73 times 0, 1, 76 times 0, 1, 81 times 0, 1, 84 times 0, 1, 89 times 0, 1, 93 times 0, 1, 98 times 0, 1, 103 times 0, 1, 108 times 0, 1, 113 times 0, 1, 119 times 0, 1, 125 times 0, 1, 131 times 0, 1, 138 times 0, 1, 144 times 0, 1, 152 times 0, 1, 159 times 0, 1, 167 times 0, 1, 175 times 0, 1, 184 times 0, 1, 193 times 0, 1, 203 times 0, 1, 213 times 0, 1, 223 times 0) based on linear OA(4³⁰, 31, F₄, 30) (dual of [31, 1, 31]-code or 31-arc in PG(29,4)), using

• dual of repetition code with length 31 [i]