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| n | a(n) |
|---|---|
| 1 | 27 |
| 2 | 81 |
| 3 | 243 |
| 4 | 694 |
| 5 | 1803 |
| 6 | 4248 |
| 7 | 9186 |
| 8 | 18483 |
| 9 | 35016 |
| 10 | 63060 |
| 11 | 108774 |
| 12 | 180801 |
| 13 | 290998 |
| 14 | 455313 |
| 15 | 694827 |
| 16 | 1036980 |
| 17 | 1517001 |
| 18 | 2179563 |
| 19 | 3080685 |
| 20 | 4289904 |
| 21 | 5892741 |
| 22 | 7993486 |
| 23 | 10718328 |
| 24 | 14218857 |
| 25 | 18675966 |
| 26 | 24304182 |
| 27 | 31356456 |
| 28 | 40129443 |
| 29 | 50969304 |
| 30 | 64278063 |
[27,81,243,694,1803,4248,9186,18483,35016,63060, 108774,180801,290998,455313,694827,1036980, 1517001,2179563,3080685,4289904,5892741,7993486, 10718328,14218857,18675966,24304182,31356456, 40129443,50969304,64278063] |