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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 16 |
| 3 | 673 |
| 4 | 15028 |
| 5 | 634896 |
| 6 | 15187422 |
| 7 | 434877820 |
| 8 | 12164306720 |
| 9 | 324326909569 |
| 10 | 8774823585744 |
| 11 | 234456940197397 |
| 12 | 6265839804921197 |
| 13 | 166204669209067429 |
| 14 | 4417764189776673340 |
| 15 | 116848264132458500949 |
| 16 | 3093181607731739407275 |
[1,16,673,15028,634896,15187422,434877820, 12164306720,324326909569,8774823585744, 234456940197397,6265839804921197, 166204669209067429,4417764189776673340, 116848264132458500949,3093181607731739407275] |