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| n | a(n) |
|---|---|
| 1 | 321 |
| 2 | 418 |
| 3 | 1483 |
| 4 | 4350 |
| 5 | 11733 |
| 6 | 28540 |
| 7 | 85617 |
| 8 | 217484 |
| 9 | 628033 |
| 10 | 1580858 |
| 11 | 4617302 |
| 12 | 11652770 |
| 13 | 33898865 |
| 14 | 85532220 |
| 15 | 249024281 |
| 16 | 628631908 |
| 17 | 1828906789 |
| 18 | 4618358508 |
| 19 | 13433388869 |
| 20 | 33933688612 |
| 21 | 98664937854 |
| 22 | 249321005374 |
| 23 | 724680771669 |
[321,418,1483,4350,11733,28540,85617,217484, 628033,1580858,4617302,11652770,33898865,85532220, 249024281,628631908,1828906789,4618358508, 13433388869,33933688612,98664937854,249321005374, 724680771669] |