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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 289 |
| 3 | 74529 |
| 4 | 19088161 |
| 5 | 4886709025 |
| 6 | 1250999747361 |
| 7 | 320255971115809 |
| 8 | 81985529178309409 |
| 9 | 20988295478809805601 |
| 10 | 5373003642721911784225 |
| 11 | 1375488932539155041567521 |
| 12 | 352125166730061220638180129 |
| 13 | 90144042682896272963324429089 |
| 14 | 23076874926821455486290258903841 |
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