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| n | a(n) |
|---|---|
| 1 | 30 |
| 2 | 225 |
| 3 | 1690 |
| 4 | 12725 |
| 5 | 95830 |
| 6 | 721705 |
| 7 | 5435250 |
| 8 | 40933565 |
| 9 | 308275950 |
| 10 | 2321665905 |
| 11 | 17484765130 |
| 12 | 131680019525 |
| 13 | 991699197190 |
| 14 | 7468614458425 |
| 15 | 56247097997730 |
| 16 | 423604143817805 |
| 17 | 3190217398715550 |
| 18 | 24025938366280065 |
| 19 | 180942438158822650 |
[30,225,1690,12725,95830,721705,5435250,40933565, 308275950,2321665905,17484765130,131680019525, 991699197190,7468614458425,56247097997730, 423604143817805,3190217398715550, 24025938366280065,180942438158822650] |