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| n | a(n) |
|---|---|
| 1 | 81 |
| 2 | 1296 |
| 3 | 5880 |
| 4 | 19608 |
| 5 | 57387 |
| 6 | 151010 |
| 7 | 363392 |
| 8 | 810436 |
| 9 | 1693423 |
| 10 | 3344982 |
| 11 | 6292120 |
| 12 | 11340202 |
| 13 | 19682181 |
| 14 | 33037788 |
| 15 | 53827802 |
| 16 | 85388930 |
| 17 | 132235237 |
| 18 | 200372476 |
| 19 | 297672078 |
| 20 | 434311972 |
| 21 | 623291815 |
| 22 | 881030622 |
| 23 | 1228055196 |
| 24 | 1689788168 |
[81,1296,5880,19608,57387,151010,363392,810436, 1693423,3344982,6292120,11340202,19682181, 33037788,53827802,85388930,132235237,200372476, 297672078,434311972,623291815,881030622, 1228055196,1689788168] |