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| n | a(n) |
|---|---|
| 1 | 323 |
| 2 | 959 |
| 3 | 3366 |
| 4 | 11334 |
| 5 | 38966 |
| 6 | 134907 |
| 7 | 464384 |
| 8 | 1603397 |
| 9 | 5553753 |
| 10 | 19211480 |
| 11 | 66422368 |
| 12 | 229808142 |
| 13 | 795271777 |
| 14 | 2751760322 |
| 15 | 9521215485 |
| 16 | 32945797509 |
| 17 | 114006440916 |
| 18 | 394517543590 |
| 19 | 1365232224566 |
| 20 | 4724489737361 |
| 21 | 16349870593488 |
[323,959,3366,11334,38966,134907,464384,1603397, 5553753,19211480,66422368,229808142,795271777, 2751760322,9521215485,32945797509,114006440916, 394517543590,1365232224566,4724489737361, 16349870593488] |