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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 5 |
| 3 | 5 |
| 4 | 149 |
| 5 | 853 |
| 6 | 2389 |
| 7 | 17749 |
| 8 | 70997 |
| 9 | 218453 |
| 10 | 2708821 |
| 11 | 3495253 |
| 12 | 13981013 |
| 13 | 39146837 |
| 14 | 492131669 |
| 15 | 626349397 |
| 16 | 27201459541 |
| 17 | 27201459541 |
| 18 | 297784399189 |
| 19 | 297784399189 |
| 20 | 3665038759253 |
| 21 | 3665038759253 |
| 22 | 89426945725781 |
[2,5,5,149,853,2389,17749,70997,218453,2708821, 3495253,13981013,39146837,492131669,626349397, 27201459541,27201459541,297784399189,297784399189, 3665038759253,3665038759253,89426945725781] |