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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 5 |
| 5 | 9 |
| 6 | 15 |
| 7 | 27 |
| 8 | 40 |
| 9 | 63 |
| 10 | 100 |
| 11 | 180 |
| 12 | 248 |
| 13 | 459 |
| 14 | 696 |
| 15 | 1019 |
| 16 | 1299 |
| 17 | 2495 |
| 18 | 3219 |
| 19 | 6011 |
| 20 | 7986 |
| 21 | 11247 |
| 22 | 17029 |
| 23 | 32567 |
| 24 | 39501 |
| 25 | 53017 |
| 26 | 79775 |
| 27 | 97251 |
| 28 | 126981 |
| 29 | 245675 |
| 30 | 301054 |
| 31 | 582853 |
| 32 | 668274 |
| 33 | 921616 |
| 34 | 1382954 |
| 35 | 1811949 |
| 36 | 2097059 |
| 37 | 4088346 |
| 38 | 6142187 |
| 39 | 8417004 |
[1,2,3,5,9,15,27,40,63,100,180,248,459,696,1019, 1299,2495,3219,6011,7986,11247,17029,32567,39501, 53017,79775,97251,126981,245675,301054,582853, 668274,921616,1382954,1811949,2097059,4088346, 6142187,8417004] |