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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 7 |
| 2 | 81 |
| 3 | 1399 |
| 4 | 32289 |
| 5 | 931687 |
| 6 | 32259441 |
| 7 | 1303134679 |
| 8 | 60160827969 |
| 9 | 3124574220487 |
| 10 | 180312309395601 |
| 11 | 11445969681199159 |
| 12 | 792626097462398049 |
| 13 | 59462922484586318887 |
| 14 | 4804064349575887075761 |
| 15 | 415847988794676360818839 |
| 16 | 38396277196654611908582529 |
| 17 | 3766800071614388562865514887 |
[1,7,81,1399,32289,931687,32259441,1303134679, 60160827969,3124574220487,180312309395601, 11445969681199159,792626097462398049, 59462922484586318887,4804064349575887075761, 415847988794676360818839, 38396277196654611908582529, 3766800071614388562865514887] |