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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 27 |
| 3 | 572 |
| 4 | 16787 |
| 5 | 631362 |
| 6 | 28980861 |
| 7 | 1570956872 |
| 8 | 98212870233 |
| 9 | 6956704585554 |
| 10 | 550626446263423 |
| 11 | 48163137319172436 |
| 12 | 4613554511554200251 |
| 13 | 480324019903607680066 |
| 14 | 54004504167811544647161 |
| 15 | 6521368218660772789452944 |
| 16 | 841771274136198763040518633 |
[1,2,27,572,16787,631362,28980861,1570956872, 98212870233,6956704585554,550626446263423, 48163137319172436,4613554511554200251, 480324019903607680066,54004504167811544647161, 6521368218660772789452944, 841771274136198763040518633] |