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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 15 |
| 3 | 36 |
| 4 | 45 |
| 5 | 325 |
| 6 | 561 |
| 7 | 1225 |
| 8 | 1540 |
| 9 | 3025 |
| 10 | 4186 |
| 11 | 11781 |
| 12 | 40755 |
| 13 | 41041 |
| 14 | 58311 |
| 15 | 121771 |
| 16 | 221445 |
| 17 | 1334161 |
| 18 | 1413721 |
| 19 | 1777555 |
| 20 | 3000025 |
| 21 | 5785101 |
| 22 | 27169506 |
| 23 | 36855405 |
| 24 | 113123361 |
| 25 | 321197185 |
| 26 | 1167483681 |
| 27 | 1533776805 |
| 28 | 1631432881 |
[1,15,36,45,325,561,1225,1540,3025,4186,11781, 40755,41041,58311,121771,221445,1334161,1413721, 1777555,3000025,5785101,27169506,36855405, 113123361,321197185,1167483681,1533776805, 1631432881] |