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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 5 |
| 3 | 39 |
| 4 | 493 |
| 5 | 9320 |
| 6 | 242366 |
| 7 | 8193031 |
| 8 | 346270455 |
| 9 | 17780116911 |
| 10 | 1085004090887 |
| 11 | 77324278953174 |
| 12 | 6344818280326312 |
| 13 | 592415284729545433 |
| 14 | 62319734032202722887 |
| 15 | 7323734663214254662683 |
| 16 | 954467851066831095051393 |
| 17 | 137065739258353347820981920 |
[1,1,5,39,493,9320,242366,8193031,346270455, 17780116911,1085004090887,77324278953174, 6344818280326312,592415284729545433, 62319734032202722887,7323734663214254662683, 954467851066831095051393, 137065739258353347820981920] |