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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 6 |
| 4 | 11 |
| 5 | 20 |
| 6 | 35 |
| 7 | 58 |
| 8 | 96 |
| 9 | 154 |
| 10 | 242 |
| 11 | 375 |
| 12 | 573 |
| 13 | 861 |
| 14 | 1282 |
| 15 | 1886 |
| 16 | 2745 |
| 17 | 3961 |
| 18 | 5667 |
| 19 | 8038 |
| 20 | 11323 |
| 21 | 15836 |
| 22 | 22001 |
| 23 | 30383 |
| 24 | 41715 |
| 25 | 56953 |
| 26 | 77363 |
| 27 | 104566 |
| 28 | 140668 |
| 29 | 188397 |
| 30 | 251247 |
| 31 | 333689 |
| 32 | 441474 |
| 33 | 581890 |
| 34 | 764215 |
| 35 | 1000233 |
| 36 | 1304815 |
| 37 | 1696717 |
| 38 | 2199591 |
| 39 | 2843073 |
| 40 | 3664312 |
[1,3,6,11,20,35,58,96,154,242,375,573,861,1282, 1886,2745,3961,5667,8038,11323,15836,22001,30383, 41715,56953,77363,104566,140668,188397,251247, 333689,441474,581890,764215,1000233,1304815, 1696717,2199591,2843073,3664312] |