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| n | a(n) |
|---|---|
| 2 | 1 |
| 3 | 13 |
| 4 | 81 |
| 5 | 325 |
| 6 | 995 |
| 7 | 2541 |
| 8 | 5698 |
| 9 | 11586 |
| 10 | 21825 |
| 11 | 38665 |
| 12 | 65131 |
| 13 | 105183 |
| 14 | 163891 |
| 15 | 247625 |
| 16 | 364260 |
| 17 | 523396 |
| 18 | 736593 |
| 19 | 1017621 |
| 20 | 1382725 |
| 21 | 1850905 |
| 22 | 2444211 |
| 23 | 3188053 |
| 24 | 4111526 |
| 25 | 5247750 |
| 26 | 6634225 |
| 27 | 8313201 |
| 28 | 10332063 |
| 29 | 12743731 |
| 30 | 15607075 |
[1,13,81,325,995,2541,5698,11586,21825,38665, 65131,105183,163891,247625,364260,523396,736593, 1017621,1382725,1850905,2444211,3188053,4111526, 5247750,6634225,8313201,10332063,12743731, 15607075] |