| n | a(n) |
|---|---|
| 4 | 6 |
| 5 | 11 |
| 6 | 20 |
| 7 | 36 |
| 8 | 65 |
| 9 | 119 |
| 10 | 218 |
| 11 | 400 |
| 12 | 735 |
| 13 | 1351 |
| 14 | 2484 |
| 15 | 4568 |
| 16 | 8401 |
| 17 | 15451 |
| 18 | 28418 |
| 19 | 52268 |
| 20 | 96135 |
| 21 | 176819 |
| 22 | 325220 |
| 23 | 598172 |
| 24 | 1100209 |
| 25 | 2023599 |
| 26 | 3721978 |
| 27 | 6845784 |
| 28 | 12591359 |
| 29 | 23159119 |
| 30 | 42596260 |
| 31 | 78346736 |
| 32 | 144102113 |
| 33 | 265045107 |
| 34 | 487493954 |
[6,11,20,36,65,119,218,400,735,1351,2484,4568, 8401,15451,28418,52268,96135,176819,325220,598172, 1100209,2023599,3721978,6845784,12591359,23159119, 42596260,78346736,144102113,265045107,487493954] |