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| n | a(n) |
|---|---|
| 1 | 369 |
| 2 | 978 |
| 3 | 3318 |
| 4 | 9198 |
| 5 | 34674 |
| 6 | 97380 |
| 7 | 370008 |
| 8 | 1053624 |
| 9 | 4060848 |
| 10 | 11593452 |
| 11 | 44691564 |
| 12 | 127862298 |
| 13 | 493245942 |
| 14 | 1412611194 |
| 15 | 5445496374 |
| 16 | 15610049862 |
| 17 | 60135842922 |
| 18 | 172528522548 |
| 19 | 664117714260 |
| 20 | 1906895501304 |
| 21 | 7334482622244 |
| 22 | 21076547401356 |
[369,978,3318,9198,34674,97380,370008,1053624, 4060848,11593452,44691564,127862298,493245942, 1412611194,5445496374,15610049862,60135842922, 172528522548,664117714260,1906895501304, 7334482622244,21076547401356] |