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| n | a(n) |
|---|---|
| 1 | 9 |
| 2 | 81 |
| 3 | 484 |
| 4 | 2116 |
| 5 | 7396 |
| 6 | 21904 |
| 7 | 57121 |
| 8 | 134689 |
| 9 | 292681 |
| 10 | 594441 |
| 11 | 1140624 |
| 12 | 2085136 |
| 13 | 3655744 |
| 14 | 6180196 |
| 15 | 10118761 |
| 16 | 16104169 |
| 17 | 24990001 |
| 18 | 37908649 |
| 19 | 56340036 |
| 20 | 82192356 |
| 21 | 117896164 |
| 22 | 166513216 |
| 23 | 231861529 |
| 24 | 318658201 |
| 25 | 432681601 |
| 26 | 580954609 |
| 27 | 771950656 |
[9,81,484,2116,7396,21904,57121,134689,292681, 594441,1140624,2085136,3655744,6180196,10118761, 16104169,24990001,37908649,56340036,82192356, 117896164,166513216,231861529,318658201,432681601, 580954609,771950656] |