| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 4 |
| 3 | 4 |
| 4 | 4 |
| 5 | 6 |
| 6 | 6 |
| 7 | 8 |
| 8 | 8 |
| 9 | 8 |
| 10 | 8 |
| 11 | 10 |
| 12 | 10 |
| 13 | 12 |
| 14 | 14 |
| 15 | 16 |
| 16 | 16 |
| 17 | 16 |
| 18 | 16 |
| 19 | 16 |
| 20 | 16 |
| 21 | 16 |
| 22 | 18 |
| 23 | 18 |
| 24 | 20 |
| 25 | 22 |
| 26 | 24 |
| 27 | 26 |
| 28 | 28 |
| 29 | 30 |
| 30 | 32 |
| 31 | 32 |
| 32 | 32 |
| 33 | 32 |
| 34 | 32 |
| 35 | 32 |
| 36 | 32 |
| 37 | 32 |
| 38 | 32 |
| 39 | 32 |
| 40 | 34 |
| 41 | 34 |
| 42 | 36 |
| 43 | 38 |
| 44 | 40 |
| 45 | 42 |
| 46 | 44 |
| 47 | 46 |
| 48 | 46 |
| 49 | 48 |
| 50 | 48 |
| 51 | 50 |
| 52 | 52 |
| 53 | 54 |
| 54 | 54 |
| 55 | 56 |
| 56 | 56 |
| 57 | 58 |
| 58 | 58 |
| 59 | 60 |
| 60 | 60 |
| 61 | 62 |
| 62 | 64 |
| 63 | 64 |
| 64 | 64 |
| 65 | 64 |
| 66 | 64 |
| 67 | 64 |
| 68 | 64 |
| 69 | 64 |
| 70 | 64 |
| 71 | 64 |
| 72 | 64 |
[2,4,4,4,6,6,8,8,8,8,10,10,12,14,16,16,16,16,16, 16,16,18,18,20,22,24,26,28,30,32,32,32,32,32,32, 32,32,32,32,34,34,36,38,40,42,44,46,46,48,48,50, 52,54,54,56,56,58,58,60,60,62,64,64,64,64,64,64, 64,64,64,64,64] |