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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 9 |
| 3 | 41 |
| 4 | 593 |
| 5 | 135457 |
| 6 | 8606778433 |
| 7 | 36893769626691833985 |
| 8 | 680564733921105089459460297630318346497 |
| 9 | 231584178474632390853419071752762496470716041121409734167406717963826481922561 |
[1,3,9,41,593,135457,8606778433, 36893769626691833985, 680564733921105089459460297630318346497, 23158417847463239085341907175276249647071604112140\ 9734167406717963826481922561] |