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| n | a(n) |
|---|---|
| 1 | 30 |
| 2 | 969 |
| 3 | 9684 |
| 4 | 54045 |
| 5 | 213042 |
| 6 | 667065 |
| 7 | 1773384 |
| 8 | 4171869 |
| 9 | 8925990 |
| 10 | 17704137 |
| 11 | 33006300 |
| 12 | 58441149 |
| 13 | 99058554 |
| 14 | 161742585 |
| 15 | 255670032 |
| 16 | 392839485 |
| 17 | 588676014 |
| 18 | 862716489 |
| 19 | 1239380580 |
| 20 | 1748832477 |
| 21 | 2427938370 |
| 22 | 3321324729 |
| 23 | 4482542424 |
[30,969,9684,54045,213042,667065,1773384,4171869, 8925990,17704137,33006300,58441149,99058554, 161742585,255670032,392839485,588676014,862716489, 1239380580,1748832477,2427938370,3321324729, 4482542424] |