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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 9 |
| 3 | 242 |
| 4 | 1866 |
| 5 | 6503 |
| 6 | 15973 |
| 7 | 33236 |
| 8 | 62678 |
| 9 | 110487 |
| 10 | 185231 |
| 11 | 298538 |
| 12 | 465912 |
| 13 | 707702 |
| 14 | 1050242 |
| 15 | 1527181 |
| 16 | 2181023 |
| 17 | 3064898 |
| 18 | 4244586 |
| 19 | 5800817 |
| 20 | 7831871 |
| 21 | 10456503 |
[1,9,242,1866,6503,15973,33236,62678,110487, 185231,298538,465912,707702,1050242,1527181, 2181023,3064898,4244586,5800817,7831871,10456503] |