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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 1 |
| 3 | 45 |
| 4 | 12 |
| 5 | 1 |
| 6 | 6687 |
| 7 | 801 |
| 8 | 39 |
| 9 | 1 |
| 10 | 10782369 |
| 11 | 540720 |
| 12 | 10764 |
| 13 | 120 |
| 14 | 1 |
| 15 | 169490304819 |
| 16 | 3499254081 |
| 17 | 29275956 |
| 18 | 129348 |
| 19 | 363 |
| 20 | 1 |
| 21 | 25016281429306077 |
| 22 | 206071208583660 |
| 23 | 709664882337 |
| 24 | 1321144632 |
| 25 | 1459773 |
| 26 | 1092 |
| 27 | 1 |
| 28 | 34185693516532070487615 |
[1,3,1,45,12,1,6687,801,39,1,10782369,540720, 10764,120,1,169490304819,3499254081,29275956, 129348,363,1,25016281429306077,206071208583660, 709664882337,1321144632,1459773,1092,1, 34185693516532070487615] |