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| n | a(n) |
|---|---|
| 10 | 1 |
| 11 | 56 |
| 12 | 1772 |
| 13 | 41835 |
| 14 | 822277 |
| 15 | 14253254 |
| 16 | 225620777 |
| 17 | 3337585487 |
| 18 | 46894138343 |
| 19 | 633327676249 |
| 20 | 8297945378872 |
| 21 | 106274752981884 |
| 22 | 1339352574256161 |
| 23 | 16713308238007881 |
| 24 | 207742699406820799 |
| 25 | 2586686884152971976 |
| 26 | 32427925119758431591 |
| 27 | 410991858695177722552 |
[1,56,1772,41835,822277,14253254,225620777, 3337585487,46894138343,633327676249,8297945378872, 106274752981884,1339352574256161, 16713308238007881,207742699406820799, 2586686884152971976,32427925119758431591, 410991858695177722552] |