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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 7 |
| 3 | 14 |
| 4 | 33 |
| 5 | 70 |
| 6 | 157 |
| 7 | 346 |
| 8 | 769 |
| 9 | 1710 |
| 10 | 3813 |
| 11 | 8514 |
| 12 | 19049 |
| 13 | 42678 |
| 14 | 95757 |
| 15 | 215114 |
| 16 | 483793 |
| 17 | 1089150 |
| 18 | 2454197 |
| 19 | 5534546 |
| 20 | 12490169 |
| 21 | 28205510 |
| 22 | 63730653 |
| 23 | 144073434 |
| 24 | 325848609 |
| 25 | 737262478 |
| 26 | 1668717957 |
| 27 | 3778162914 |
| 28 | 8556569353 |
| 29 | 19383222230 |
| 30 | 43918469037 |
[1,7,14,33,70,157,346,769,1710,3813,8514,19049, 42678,95757,215114,483793,1089150,2454197,5534546, 12490169,28205510,63730653,144073434,325848609, 737262478,1668717957,3778162914,8556569353, 19383222230,43918469037] |