Linear OA(5¹⁸, 7100, F₅, 4) (dual of [7100, 7082, 5]-code), using 7075 step VarÅ¡amov–Edel lengthening with (r_i) = (1, 0, 1, 5 times 0, 1, 11 times 0, 1, 21 times 0, 1, 39 times 0, 1, 67 times 0, 1, 116 times 0, 1, 199 times 0, 1, 343 times 0, 1, 587 times 0, 1, 1006 times 0, 1, 1722 times 0, 1, 2945 times 0) based on linear OA(5⁵, 12, F₅, 4) (dual of [12, 7, 5]-code), using

• codes constructed by inverting construction Y₁ [i]