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| n | a(n) |
|---|---|
| 0 | 11 |
| 1 | 71 |
| 2 | 491 |
| 3 | 3433 |
| 4 | 24019 |
| 5 | 168071 |
| 6 | 11764967 |
| 7 | 8235431 |
| 8 | 576480103 |
| 9 | 403536071 |
| 10 | 2824752493 |
| 11 | 19773267431 |
| 12 | 1384128720101 |
| 13 | 9688901040727 |
| 14 | 6782230728491 |
| 15 | 474756150994337 |
| 16 | 3323293056960127 |
| 17 | 23263051398720713 |
| 18 | 162841359791044903 |
[11,71,491,3433,24019,168071,11764967,8235431, 576480103,403536071,2824752493,19773267431, 1384128720101,9688901040727,6782230728491, 474756150994337,3323293056960127, 23263051398720713,162841359791044903] |