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| n | a(n) |
|---|---|
| 1 | 1540 |
| 2 | 19530 |
| 3 | 221984 |
| 4 | 2567334 |
| 5 | 32233938 |
| 6 | 410475622 |
| 7 | 5230842688 |
| 8 | 66651385442 |
| 9 | 852399648492 |
| 10 | 10942076565344 |
| 11 | 140893244263052 |
| 12 | 1818559742718468 |
| 13 | 23521609925458628 |
| 14 | 304795848113641082 |
| 15 | 3956133736667718388 |
[1540,19530,221984,2567334,32233938,410475622, 5230842688,66651385442,852399648492, 10942076565344,140893244263052,1818559742718468, 23521609925458628,304795848113641082, 3956133736667718388] |