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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 7 |
| 4 | 158 |
| 5 | 1617 |
| 6 | 6211 |
| 7 | 8058 |
| 8 | 16765 |
| 9 | 69093 |
| 10 | 465988 |
| 11 | 5297983 |
| 12 | 6546724 |
| 13 | 18588348 |
| 14 | 38244610 |
| 15 | 204136352 |
| 16 | 430712111 |
| 17 | 2760559191 |
| 18 | 100878516991 |
| 19 | 440393924631 |
[1,2,7,158,1617,6211,8058,16765,69093,465988, 5297983,6546724,18588348,38244610,204136352, 430712111,2760559191,100878516991,440393924631] |