| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 1222 |
| 3 | 105368 |
| 4 | 3291920 |
| 5 | 76670685 |
| 6 | 1545796513 |
| 7 | 28420462973 |
| 8 | 491401215701 |
| 9 | 8126888074239 |
| 10 | 129958666983361 |
| 11 | 2024165699180711 |
| 12 | 30866308386890563 |
| 13 | 462552108806872516 |
| 14 | 6831420125251082224 |
| 15 | 99653407647500373847 |
[2,1222,105368,3291920,76670685,1545796513, 28420462973,491401215701,8126888074239, 129958666983361,2024165699180711, 30866308386890563,462552108806872516, 6831420125251082224,99653407647500373847] |