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| n | a(n) |
|---|---|
| 1 | 20537 |
| 2 | 1403872 |
| 3 | 87473420 |
| 4 | 4948377018 |
| 5 | 264596677243 |
| 6 | 13346776888685 |
| 7 | 644799592944959 |
| 8 | 29960807090645254 |
| 9 | 1349539165629052781 |
| 10 | 59215045232911300005 |
| 11 | 2544072449211208400584 |
| 12 | 107453219274532827649732 |
[20537,1403872,87473420,4948377018,264596677243, 13346776888685,644799592944959,29960807090645254, 1349539165629052781,59215045232911300005, 2544072449211208400584,107453219274532827649732] |