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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 9 |
| 4 | 65 |
| 5 | 789 |
| 6 | 854 |
| 7 | 1643 |
| 8 | 2497 |
| 9 | 9134 |
| 10 | 29899 |
| 11 | 39033 |
| 12 | 68932 |
| 13 | 107965 |
| 14 | 1364512 |
| 15 | 9659549 |
| 16 | 40002708 |
| 17 | 49662257 |
| 18 | 89664965 |
| 19 | 4532910507 |
| 20 | 4622575472 |
| 21 | 9155485979 |
| 22 | 41244519388 |
| 23 | 297867121695 |
| 24 | 3615649979728 |
| 25 | 3913517101423 |
| 26 | 7529167081151 |
| 27 | 11442684182574 |
| 28 | 41857219628873 |
[1,1,2,9,65,789,854,1643,2497,9134,29899,39033, 68932,107965,1364512,9659549,40002708,49662257, 89664965,4532910507,4622575472,9155485979, 41244519388,297867121695,3615649979728, 3913517101423,7529167081151,11442684182574, 41857219628873] |