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| n | a(n) |
|---|---|
| 1 | 15 |
| 2 | 105 |
| 3 | 2145 |
| 4 | 11628 |
| 5 | 94395 |
| 6 | 370230 |
| 7 | 1565565 |
| 8 | 3265290 |
| 9 | 13263825 |
| 10 | 16689753 |
| 11 | 44674878 |
| 12 | 62434725 |
| 13 | 129757995 |
| 14 | 168095280 |
| 15 | 190173753 |
| 16 | 334822503 |
| 17 | 411256860 |
| 18 | 659371455 |
| 19 | 784892010 |
| 20 | 1176876870 |
| 21 | 1822721253 |
| 22 | 3871076055 |
| 23 | 4333386060 |
| 24 | 5670113295 |
| 25 | 9245348190 |
| 26 | 13148662530 |
[15,105,2145,11628,94395,370230,1565565,3265290, 13263825,16689753,44674878,62434725,129757995, 168095280,190173753,334822503,411256860,659371455, 784892010,1176876870,1822721253,3871076055, 4333386060,5670113295,9245348190,13148662530] |