Linear OA(4¹³⁷, 5244, F₄, 27) (dual of [5244, 5107, 28]-code), using 5106 step VarÅ¡amov–Edel lengthening with (r_i) = (7, 4, 2, 2, 1, 2, 1, 1, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 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, 4 times 0, 1, 4 times 0, 1, 4 times 0, 1, 4 times 0, 1, 5 times 0, 1, 5 times 0, 1, 6 times 0, 1, 6 times 0, 1, 6 times 0, 1, 7 times 0, 1, 8 times 0, 1, 8 times 0, 1, 8 times 0, 1, 9 times 0, 1, 10 times 0, 1, 10 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, 19 times 0, 1, 20 times 0, 1, 21 times 0, 1, 23 times 0, 1, 24 times 0, 1, 25 times 0, 1, 27 times 0, 1, 29 times 0, 1, 30 times 0, 1, 32 times 0, 1, 34 times 0, 1, 35 times 0, 1, 38 times 0, 1, 40 times 0, 1, 42 times 0, 1, 45 times 0, 1, 47 times 0, 1, 50 times 0, 1, 53 times 0, 1, 56 times 0, 1, 59 times 0, 1, 63 times 0, 1, 66 times 0, 1, 69 times 0, 1, 74 times 0, 1, 77 times 0, 1, 82 times 0, 1, 87 times 0, 1, 92 times 0, 1, 96 times 0, 1, 102 times 0, 1, 108 times 0, 1, 114 times 0, 1, 120 times 0, 1, 127 times 0, 1, 133 times 0, 1, 141 times 0, 1, 149 times 0, 1, 158 times 0, 1, 166 times 0, 1, 175 times 0, 1, 185 times 0, 1, 195 times 0, 1, 206 times 0, 1, 218 times 0, 1, 229 times 0, 1, 242 times 0, 1, 256 times 0, 1, 270 times 0) based on linear OA(4²⁷, 28, F₄, 27) (dual of [28, 1, 28]-code or 28-arc in PG(26,4)), using

• dual of repetition code with length 28 [i]