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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 4 |
| 5 | 6 |
| 6 | 9 |
| 7 | 14 |
| 8 | 33 |
| 9 | 47 |
| 10 | 63 |
| 11 | 121 |
| 12 | 203 |
| 13 | 312 |
| 14 | 469 |
| 15 | 867 |
| 16 | 1482 |
| 17 | 1969 |
| 18 | 3288 |
| 19 | 6470 |
| 20 | 9376 |
| 21 | 13429 |
| 22 | 24872 |
| 23 | 42253 |
| 24 | 61377 |
| 25 | 97504 |
| 26 | 175250 |
| 27 | 277678 |
| 28 | 413675 |
| 29 | 700594 |
| 30 | 1193566 |
| 31 | 1842503 |
| 32 | 2889154 |
| 33 | 4901502 |
| 34 | 8051064 |
| 35 | 12455432 |
| 36 | 20026636 |
| 37 | 34079228 |
| 38 | 54609720 |
| 39 | 83775247 |
| 40 | 140490784 |
| 41 | 235393569 |
[1,1,1,4,6,9,14,33,47,63,121,203,312,469,867,1482, 1969,3288,6470,9376,13429,24872,42253,61377,97504, 175250,277678,413675,700594,1193566,1842503, 2889154,4901502,8051064,12455432,20026636, 34079228,54609720,83775247,140490784,235393569] |