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| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 15 |
| 3 | 91 |
| 4 | 231 |
| 5 | 1363 |
| 6 | 2497 |
| 7 | 4963 |
| 8 | 5379 |
| 9 | 12397 |
| 10 | 26395 |
| 11 | 120253 |
| 12 | 200145 |
[3,15,91,231,1363,2497,4963,5379,12397,26395, 120253,200145] |