| n | a(n) |
|---|---|
| 4 | 13 |
| 5 | 3223 |
| 6 | 120420 |
| 7 | 1313859 |
| 8 | 7979037 |
| 9 | 34212213 |
| 10 | 116257928 |
| 11 | 334277285 |
| 12 | 847224269 |
| 13 | 1945263907 |
| 14 | 4124812588 |
| 15 | 8191927383 |
| 16 | 15400417725 |
| 17 | 27631699329 |
| 18 | 47624056752 |
| 19 | 79259627513 |
| 20 | 127918067213 |
| 21 | 200906501615 |
| 22 | 307976018164 |
| 23 | 461935595947 |
[13,3223,120420,1313859,7979037,34212213, 116257928,334277285,847224269,1945263907, 4124812588,8191927383,15400417725,27631699329, 47624056752,79259627513,127918067213,200906501615, 307976018164,461935595947] |