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| n | a(n) |
|---|---|
| 4 | 2 |
| 5 | 3 |
| 6 | 6 |
| 7 | 11 |
| 8 | 20 |
| 9 | 25 |
| 10 | 41 |
| 11 | 85 |
| 12 | 148 |
| 13 | 355 |
| 14 | 751 |
| 15 | 1701 |
| 16 | 3756 |
| 17 | 8255 |
| 18 | 17513 |
| 19 | 37038 |
| 20 | 76349 |
| 21 | 156618 |
| 22 | 317591 |
| 23 | 639142 |
| 24 | 1279302 |
| 25 | 2546711 |
| 26 | 5057675 |
| 27 | 10010975 |
| 28 | 19788607 |
| 29 | 39058684 |
| 30 | 77055159 |
| 31 | 151930328 |
| 32 | 299600229 |
| 33 | 590849561 |
| 34 | 1165782514 |
| 35 | 2301229945 |
| 36 | 4545782370 |
| 37 | 8985884632 |
[2,3,6,11,20,25,41,85,148,355,751,1701,3756,8255, 17513,37038,76349,156618,317591,639142,1279302, 2546711,5057675,10010975,19788607,39058684, 77055159,151930328,299600229,590849561,1165782514, 2301229945,4545782370,8985884632] |