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| n | a(n) |
|---|---|
| 1 | 69 |
| 2 | 533 |
| 3 | 4033 |
| 4 | 30177 |
| 5 | 223197 |
| 6 | 1634877 |
| 7 | 11870705 |
| 8 | 85525665 |
| 9 | 611921697 |
| 10 | 4350979769 |
| 11 | 30763863645 |
| 12 | 216419598445 |
| 13 | 1515531563165 |
| 14 | 10568991793581 |
| 15 | 73429250621533 |
| 16 | 508417994900109 |
| 17 | 3509319518941045 |
| 18 | 24154369305654701 |
| 19 | 165824297901834385 |
[69,533,4033,30177,223197,1634877,11870705, 85525665,611921697,4350979769,30763863645, 216419598445,1515531563165,10568991793581, 73429250621533,508417994900109,3509319518941045, 24154369305654701,165824297901834385] |