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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 3 |
| 3 | 4 |
| 4 | 5 |
| 5 | 29 |
| 6 | 41 |
| 7 | 55 |
| 8 | 71 |
| 9 | 791 |
| 10 | 1079 |
| 11 | 30239 |
| 12 | 246960 |
| 13 | 636481 |
| 14 | 1360800 |
| 15 | 2162161 |
| 16 | 39412801 |
| 17 | 107881201 |
| 18 | 3625549201 |
| 19 | 170918748000 |
| 20 | 2355997644001 |
| 21 | 237662810985599 |
| 22 | 4614209634434399 |
| 23 | 7522575180120001 |
| 24 | 362645725505263201 |
| 25 | 10684484093105222399 |
| 26 | 442709913651892286399 |
| 27 | 5205240636387758366399 |
[2,3,4,5,29,41,55,71,791,1079,30239,246960,636481, 1360800,2162161,39412801,107881201,3625549201, 170918748000,2355997644001,237662810985599, 4614209634434399,7522575180120001, 362645725505263201,10684484093105222399, 442709913651892286399,5205240636387758366399] |