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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 3 |
| 3 | 4 |
| 4 | 5 |
| 5 | 8 |
| 6 | 12 |
| 7 | 18 |
| 8 | 26 |
| 9 | 40 |
| 10 | 60 |
| 11 | 90 |
| 12 | 134 |
| 13 | 202 |
| 14 | 303 |
| 15 | 454 |
| 16 | 680 |
| 17 | 1021 |
| 18 | 1532 |
| 19 | 2298 |
| 20 | 3447 |
| 21 | 5173 |
| 22 | 7762 |
| 23 | 11646 |
| 24 | 17473 |
| 25 | 26218 |
| 26 | 39338 |
| 27 | 59023 |
| 28 | 88558 |
| 29 | 132875 |
| 30 | 199368 |
| 31 | 299135 |
| 32 | 448827 |
| 33 | 673430 |
| 34 | 1010428 |
| 35 | 1516066 |
| 36 | 2274735 |
| 37 | 3413059 |
| 38 | 5121022 |
| 39 | 7683683 |
| 40 | 11528750 |
[2,3,4,5,8,12,18,26,40,60,90,134,202,303,454,680, 1021,1532,2298,3447,5173,7762,11646,17473,26218, 39338,59023,88558,132875,199368,299135,448827, 673430,1010428,1516066,2274735,3413059,5121022, 7683683,11528750] |