| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 4 |
| 3 | 5 |
| 4 | 6 |
| 5 | 7 |
| 6 | 7 |
| 7 | 9 |
| 8 | 10 |
| 9 | 11 |
| 10 | 12 |
| 11 | 13 |
| 12 | 15 |
| 13 | 15 |
| 14 | 17 |
| 15 | 19 |
| 16 | 20 |
| 17 | 20 |
| 18 | 22 |
| 19 | 22 |
| 20 | 23 |
| 21 | 23 |
| 22 | 25 |
| 23 | 25 |
| 24 | 26 |
| 25 | 28 |
| 26 | 29 |
| 27 | 31 |
| 28 | 31 |
| 29 | 32 |
| 30 | 32 |
| 31 | 32 |
| 32 | 33 |
| 33 | 34 |
| 34 | 36 |
| 35 | 37 |
| 36 | 38 |
| 37 | 38 |
| 38 | 39 |
| 39 | 39 |
| 40 | 41 |
| 41 | 41 |
| 42 | 43 |
| 43 | 44 |
| 44 | 44 |
| 45 | 46 |
| 46 | 47 |
| 47 | 47 |
| 48 | 50 |
| 49 | 52 |
| 50 | 52 |
| 51 | 52 |
| 52 | 53 |
| 53 | 54 |
| 54 | 55 |
| 55 | 55 |
| 56 | 55 |
| 57 | 55 |
| 58 | 57 |
| 59 | 58 |
| 60 | 58 |
| 61 | 59 |
| 62 | 60 |
| 63 | 61 |
| 64 | 62 |
| 65 | 63 |
| 66 | 64 |
| 67 | 64 |
| 68 | 64 |
| 69 | 64 |
| 70 | 65 |
| 71 | 65 |
| 72 | 65 |
| 73 | 67 |
| 74 | 68 |
| 75 | 68 |
| 76 | 68 |
[2,4,5,6,7,7,9,10,11,12,13,15,15,17,19,20,20,22, 22,23,23,25,25,26,28,29,31,31,32,32,32,33,34,36, 37,38,38,39,39,41,41,43,44,44,46,47,47,50,52,52, 52,53,54,55,55,55,55,57,58,58,59,60,61,62,63,64, 64,64,64,65,65,65,67,68,68,68] |