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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 6 |
| 2 | 121 |
| 3 | 5446 |
| 4 | 435681 |
| 5 | 54460126 |
| 6 | 9802822681 |
| 7 | 2401691556846 |
| 8 | 768541298190721 |
| 9 | 311259225767242006 |
| 10 | 155629612883621003001 |
| 11 | 94155915794590706815606 |
| 12 | 67792259372105308907236321 |
| 13 | 57284459169428986026614691246 |
| 14 | 56138769986040406306082397421081 |
| 15 | 63156116234295457094342697098716126 |
[1,6,121,5446,435681,54460126,9802822681, 2401691556846,768541298190721,311259225767242006, 155629612883621003001,94155915794590706815606, 67792259372105308907236321, 57284459169428986026614691246, 56138769986040406306082397421081, 63156116234295457094342697098716126] |