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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 9 |
| 4 | 27 |
| 5 | 747 |
| 6 | 36321 |
| 7 | 2900979 |
| 8 | 5843427 |
| 9 | 563210019 |
| 10 | 11516632737 |
| 11 | 48957047673 |
| 12 | 953426773899 |
| 13 | 23440805582361 |
| 14 | 27491112569139 |
| 15 | 734940417828177 |
| 16 | 1270701455204457 |
| 17 | 106719437154440984241 |
| 18 | 292398373544007804918339 |
| 19 | 62392836359922644036329593 |
| 20 | 607918712560763608313068257 |
[1,3,9,27,747,36321,2900979,5843427,563210019, 11516632737,48957047673,953426773899, 23440805582361,27491112569139,734940417828177, 1270701455204457,106719437154440984241, 292398373544007804918339, 62392836359922644036329593, 607918712560763608313068257] |