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| n | a(n) |
|---|---|
| 1 | 645 |
| 2 | 33153 |
| 3 | 129921 |
| 4 | 157641 |
| 5 | 451905 |
| 6 | 656601 |
| 7 | 1608465 |
| 8 | 3020361 |
| 9 | 3370641 |
| 10 | 6212361 |
| 11 | 19092921 |
| 12 | 34487601 |
| 13 | 38790753 |
| 14 | 681942801 |
| 15 | 940492785 |
| 16 | 1109260545 |
| 17 | 1574300001 |
| 18 | 2693081973 |
| 19 | 3037396461 |
| 20 | 4160578521 |
| 21 | 6424683105 |
| 22 | 7384487181 |
| 23 | 13671360561 |
| 24 | 14966031345 |
| 25 | 15731001105 |
[645,33153,129921,157641,451905,656601,1608465, 3020361,3370641,6212361,19092921,34487601, 38790753,681942801,940492785,1109260545, 1574300001,2693081973,3037396461,4160578521, 6424683105,7384487181,13671360561,14966031345, 15731001105] |