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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 5 |
| 2 | 17 |
| 3 | 100 |
| 4 | 791 |
| 5 | 5830 |
| 6 | 42468 |
| 7 | 327198 |
| 8 | 2575838 |
| 9 | 20476640 |
| 10 | 166554645 |
| 11 | 1353822880 |
| 12 | 11150031169 |
| 13 | 92258920888 |
| 14 | 769310640408 |
| 15 | 6447635236133 |
| 16 | 54292816788848 |
| 17 | 459112338326268 |
| 18 | 3896226837717653 |
| 19 | 33172345145637461 |
| 20 | 283258796052356059 |
| 21 | 2425130743589880412 |
| 22 | 20812174068479995267 |
[0,5,17,100,791,5830,42468,327198,2575838, 20476640,166554645,1353822880,11150031169, 92258920888,769310640408,6447635236133, 54292816788848,459112338326268,3896226837717653, 33172345145637461,283258796052356059, 2425130743589880412,20812174068479995267] |