Linear OOA(81^m, (m+n)/4, F₈₁, 4, k) with arbitrarily large values for k and n such that n mod 4 = 1, provided that m is sufficiently large, using 81³ times duplication based on linear OOA(81^m, (m+n)/4, F₈₁, 4, k) with arbitrarily large values for k and n such that 4 divides n, provided that m is sufficiently large, using

• repeating each code word k+1 times [i] based on linear OOA(81⁰, s, F₈₁, 4, 0) for arbitrarily large s, using
  • OOA with only one run / dual of NRT-code without redundancy [i]