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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 127 |
| 3 | 9435 |
| 4 | 866751 |
| 5 | 89591753 |
| 6 | 9988439203 |
| 7 | 1173951006987 |
| 8 | 143456999185855 |
| 9 | 18063466831218981 |
| 10 | 2329136571942011877 |
| 11 | 306174745758226208537 |
| 12 | 40896708938016175140963 |
| 13 | 5536767359542664588001285 |
| 14 | 758259747093486125157272779 |
| 15 | 104880152366856305370319427435 |
| 16 | 14632959744552362547801104612799 |
[1,3,127,9435,866751,89591753,9988439203, 1173951006987,143456999185855,18063466831218981, 2329136571942011877,306174745758226208537, 40896708938016175140963,5536767359542664588001285, 758259747093486125157272779, 104880152366856305370319427435, 14632959744552362547801104612799] |