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| n | a(n) |
|---|---|
| 3 | 3 |
| 4 | 3 |
| 5 | 17 |
| 6 | 37 |
| 7 | 173 |
| 8 | 2371 |
| 9 | 3391 |
| 10 | 125131 |
| 11 | 264349 |
| 12 | 7149277 |
| 13 | 61653671 |
| 14 | 2812202941 |
| 15 | 30411031813 |
| 16 | 128360674159 |
| 17 | 6028600476203 |
| 18 | 206528184055741 |
| 19 | 2966953668508097 |
| 20 | 14063017388304277 |
| 21 | 646720786983663797 |
| 22 | 6730543280105435209 |
| 23 | 354137215601164063561 |
[3,3,17,37,173,2371,3391,125131,264349,7149277, 61653671,2812202941,30411031813,128360674159, 6028600476203,206528184055741,2966953668508097, 14063017388304277,646720786983663797, 6730543280105435209,354137215601164063561] |