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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 2 |
| 3 | 2 |
| 4 | 3 |
| 5 | 4 |
| 6 | 5 |
| 7 | 7 |
| 8 | 10 |
| 9 | 13 |
| 10 | 18 |
| 11 | 25 |
| 12 | 35 |
| 13 | 48 |
| 14 | 67 |
| 15 | 93 |
| 16 | 129 |
| 17 | 179 |
| 18 | 249 |
| 19 | 346 |
| 20 | 481 |
| 21 | 668 |
| 22 | 928 |
| 23 | 1290 |
| 24 | 1792 |
| 25 | 2491 |
| 26 | 3462 |
| 27 | 4811 |
| 28 | 6686 |
| 29 | 9292 |
| 30 | 12913 |
| 31 | 17946 |
| 32 | 24940 |
| 33 | 34660 |
| 34 | 48169 |
| 35 | 66942 |
| 36 | 93032 |
| 37 | 129291 |
| 38 | 179681 |
| 39 | 249711 |
| 40 | 347034 |
| 41 | 482289 |
| 42 | 670259 |
| 43 | 931489 |
[2,2,2,3,4,5,7,10,13,18,25,35,48,67,93,129,179, 249,346,481,668,928,1290,1792,2491,3462,4811,6686, 9292,12913,17946,24940,34660,48169,66942,93032, 129291,179681,249711,347034,482289,670259,931489] |