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| n | a(n) |
|---|---|
| 1 | 6 |
| 2 | 36 |
| 3 | 216 |
| 4 | 1276 |
| 5 | 7456 |
| 6 | 43184 |
| 7 | 248324 |
| 8 | 1419502 |
| 9 | 8074172 |
| 10 | 45734140 |
| 11 | 258127540 |
| 12 | 1452448400 |
| 13 | 8151217700 |
| 14 | 45640705908 |
| 15 | 255046211478 |
| 16 | 1422758512212 |
| 17 | 7924694792032 |
| 18 | 44081166810484 |
| 19 | 244913122501544 |
| 20 | 1359313355233592 |
[6,36,216,1276,7456,43184,248324,1419502,8074172, 45734140,258127540,1452448400,8151217700, 45640705908,255046211478,1422758512212, 7924694792032,44081166810484,244913122501544, 1359313355233592] |