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| n | a(n) |
|---|---|
| 1 | 24 |
| 2 | 66 |
| 3 | 162 |
| 4 | 376 |
| 5 | 838 |
| 6 | 1818 |
| 7 | 3868 |
| 8 | 8114 |
| 9 | 16842 |
| 10 | 34680 |
| 11 | 70974 |
| 12 | 144562 |
| 13 | 293356 |
| 14 | 593562 |
| 15 | 1198210 |
| 16 | 2414360 |
| 17 | 4857750 |
| 18 | 9762474 |
| 19 | 19600956 |
| 20 | 39324898 |
| 21 | 78848794 |
| 22 | 158019576 |
| 23 | 316560142 |
| 24 | 633963266 |
| 25 | 1269290508 |
| 26 | 2540787978 |
| 27 | 5085146898 |
| 28 | 10176071704 |
[24,66,162,376,838,1818,3868,8114,16842,34680, 70974,144562,293356,593562,1198210,2414360, 4857750,9762474,19600956,39324898,78848794, 158019576,316560142,633963266,1269290508, 2540787978,5085146898,10176071704] |