| k | N | Source |
| 4 | 8 | orthogonal array |
| 5 | 10 | Derive from strength 4 |
| 11 | 12 | Derive from strength 4 |
| 12 | 15 | tabu search (Nurmela) |
| 14 | 16 | Sloane |
| 16 | 17 | Derive from strength 4 |
| 20 | 18 | Chateauneuf-Kreher doubling |
| 22 | 19 | Chateauneuf-Kreher doubling |
| 23 | 20 | simulated annealing (Torres+Rodriguez) |
| 25 | 21 | simulated annealing (Torres+Rodriguez) |
| 26 | 22 | simulated annealing (Torres+Rodriguez) |
| 28 | 23 | simulated annealing (Torres+Rodriguez) |
| 38 | 24 | simulated annealing (Torres+Rodriguez) |
| 44 | 25 | simulated annealing (Torres+Rodriguez) |
| 46 | 26 | simulated annealing (Torres+Rodriguez) |
| 49 | 27 | simulated annealing (Torres+Rodriguez) |
| 51 | 28 | simulated annealing (Torres+Rodriguez) |
| 55 | 30 | Power 11^2,T6c |
| 56 | 31 | simulated annealing (Torres+Rodriguez) |
| 88 | 32 | Power 11^2,T3c |
| 121 | 33 | Power 11^2 |
| 123 | 36 | simulated annealing (Torres+Rodriguez) |
| 132 | 37 | simulated annealing (Torres+Rodriguez) |
| 137 | 38 | simulated annealing (Torres+Rodriguez) |
| 141 | 39 | simulated annealing (Torres+Rodriguez) |
| 142 | 40 | simulated annealing (Torres+Rodriguez) |
| 154 | 41 | Power 14^2T3 |
| 176 | 42 | Chateauneuf-Kreher doubling |
| 242 | 43 | Chateauneuf-Kreher doubling |
| 253 | 46 | Sloane |
| 264 | 48 | Chateauneuf-Kreher doubling |
| 352 | 49 | Power 11^3T7T3c |
| 484 | 50 | Power 11^3,T7c |
| 605 | 52 | Power 11^3,T6c |
| 704 | 53 | Power 11^3T3T3c |
| 968 | 54 | Power 11^3,T3c |
| 1331 | 55 | Power 11^3 |
| 1332 | 59 | Add a factor |
| 1452 | 61 | Power 12^3,cT1T1 |
| 1584 | 64 | Power 12^3,cT1 |
| 1936 | 67 | Power 11^4T7T7c |
| 2662 | 68 | Power 11^4,cT9c |
| 2816 | 70 | Power 11^4T3cT3cT7c |
| 3872 | 71 | Power 11^4T7T3c |
| 5324 | 72 | Power 11^4,T7c |
| 6655 | 74 | Power 11^4,T6c |
| 7744 | 75 | Power 11^4T3T3c |
| 10000 | 76 | Power 11^4,T3c |