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| n | a(n) |
|---|---|
| 1 | 15 |
| 2 | 225 |
| 3 | 825 |
| 4 | 1995 |
| 5 | 3915 |
| 6 | 6765 |
| 7 | 10725 |
| 8 | 15975 |
| 9 | 22695 |
| 10 | 31065 |
| 11 | 41265 |
| 12 | 53475 |
| 13 | 67875 |
| 14 | 84645 |
| 15 | 103965 |
| 16 | 126015 |
| 17 | 150975 |
| 18 | 179025 |
| 19 | 210345 |
| 20 | 245115 |
| 21 | 283515 |
| 22 | 325725 |
| 23 | 371925 |
| 24 | 422295 |
| 25 | 477015 |
| 26 | 536265 |
| 27 | 600225 |
| 28 | 669075 |
| 29 | 742995 |
| 30 | 822165 |
| 31 | 906765 |
| 32 | 996975 |
| 33 | 1092975 |
[15,225,825,1995,3915,6765,10725,15975,22695, 31065,41265,53475,67875,84645,103965,126015, 150975,179025,210345,245115,283515,325725,371925, 422295,477015,536265,600225,669075,742995,822165, 906765,996975,1092975] |