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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 27 |
| 3 | 891 |
| 4 | 57339 |
| 5 | 7340027 |
| 6 | 15032385531 |
| 7 | 123145302310907 |
| 8 | 2017612633061982203 |
| 9 | 66113130760175032991739 |
| 10 | 8665580274997661924293869563 |
| 11 | 4543259751217974174964184288067579 |
| 12 | 4763953136893138488487244504044754960379 |
| 13 | 9990733848941719167408001786146465954679226363 |
[1,3,27,891,57339,7340027,15032385531, 123145302310907,2017612633061982203, 66113130760175032991739, 8665580274997661924293869563, 4543259751217974174964184288067579, 4763953136893138488487244504044754960379, 9990733848941719167408001786146465954679226363] |