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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 4 |
| 3 | 243 |
| 4 | 17360 |
| 5 | 1350225 |
| 6 | 11047296 |
| 7 | 934771207 |
| 8 | 81013504612 |
| 9 | 7148250406947 |
| 10 | 6395802995689430 |
| 11 | 578667890086186528 |
| 12 | 52834894312217030820 |
| 13 | 48608102767239668354413 |
| 14 | 45007502562258952180012050 |
[1,4,243,17360,1350225,11047296,934771207, 81013504612,7148250406947,6395802995689430, 578667890086186528,52834894312217030820, 48608102767239668354413, 45007502562258952180012050] |