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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 7 |
| 3 | 161 |
| 4 | 7631 |
| 5 | 607009 |
| 6 | 72605303 |
| 7 | 12172272321 |
| 8 | 2722634203807 |
| 9 | 783282749905601 |
| 10 | 281751782666559239 |
| 11 | 123890976070562785633 |
| 12 | 65380371270827869603439 |
| 13 | 40779819387085820255904481 |
| 14 | 29677003954344675666092048791 |
| 15 | 24921035407468294238607282809729 |
[1,1,7,161,7631,607009,72605303,12172272321, 2722634203807,783282749905601,281751782666559239, 123890976070562785633,65380371270827869603439, 40779819387085820255904481, 29677003954344675666092048791, 24921035407468294238607282809729] |