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| n | a(n) |
|---|---|
| 1 | 9 |
| 2 | 81 |
| 3 | 252 |
| 4 | 784 |
| 5 | 1736 |
| 6 | 3844 |
| 7 | 7130 |
| 8 | 13225 |
| 9 | 21965 |
| 10 | 36481 |
| 11 | 56154 |
| 12 | 86436 |
| 13 | 125832 |
| 14 | 183184 |
| 15 | 255516 |
| 16 | 356409 |
| 17 | 480585 |
| 18 | 648025 |
| 19 | 850080 |
| 20 | 1115136 |
| 21 | 1429824 |
| 22 | 1833316 |
| 23 | 2305862 |
| 24 | 2900209 |
| 25 | 3588221 |
| 26 | 4439449 |
| 27 | 5414990 |
| 28 | 6604900 |
| 29 | 7956720 |
| 30 | 9585216 |
| 31 | 11421144 |
[9,81,252,784,1736,3844,7130,13225,21965,36481, 56154,86436,125832,183184,255516,356409,480585, 648025,850080,1115136,1429824,1833316,2305862, 2900209,3588221,4439449,5414990,6604900,7956720, 9585216,11421144] |