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| n | a(n) |
|---|---|
| 1 | 8 |
| 2 | 22 |
| 3 | 58 |
| 4 | 150 |
| 5 | 382 |
| 6 | 962 |
| 7 | 2402 |
| 8 | 5958 |
| 9 | 14702 |
| 10 | 36130 |
| 11 | 88498 |
| 12 | 216198 |
| 13 | 527038 |
| 14 | 1282562 |
| 15 | 3116738 |
| 16 | 7565190 |
| 17 | 18345422 |
| 18 | 44452642 |
| 19 | 107643922 |
| 20 | 260526918 |
| 21 | 630270622 |
| 22 | 1524213890 |
| 23 | 3684989858 |
| 24 | 8906776518 |
| 25 | 21523708718 |
| 26 | 52004525602 |
| 27 | 125633423218 |
[8,22,58,150,382,962,2402,5958,14702,36130,88498, 216198,527038,1282562,3116738,7565190,18345422, 44452642,107643922,260526918,630270622,1524213890, 3684989858,8906776518,21523708718,52004525602, 125633423218] |