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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 171 |
| 4 | 585 |
| 5 | 1161 |
| 6 | 1623 |
| 7 | 5511 |
| 8 | 7893 |
| 9 | 11133 |
| 10 | 12363 |
| 11 | 25381 |
| 12 | 67717 |
| 13 | 146853 |
| 14 | 260991 |
| 15 | 953677 |
[1,3,171,585,1161,1623,5511,7893,11133,12363, 25381,67717,146853,260991,953677] |