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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 37 |
| 3 | 557 |
| 4 | 647 |
| 5 | 9803 |
| 6 | 192583 |
| 7 | 698653 |
| 8 | 150287 |
| 9 | 34449209 |
| 10 | 136017109 |
| 11 | 191058199 |
| 12 | 618408991 |
| 13 | 564779279 |
| 14 | 40434774727 |
| 15 | 52195951979 |
| 16 | 149416079731 |
| 17 | 598718776379 |
| 18 | 802636910771 |
[2,37,557,647,9803,192583,698653,150287,34449209, 136017109,191058199,618408991,564779279, 40434774727,52195951979,149416079731,598718776379, 802636910771] |