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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 4 |
| 3 | 39 |
| 4 | 52 |
| 5 | 4069 |
| 6 | 8573 |
| 7 | 258017 |
| 8 | 46639 |
| 9 | 53371999 |
| 10 | 113518551 |
| 11 | 768140741 |
| 12 | 1560819091 |
| 13 | 242830653007 |
| 14 | 169134016817 |
| 15 | 38186305937387 |
| 16 | 408881289764107 |
| 17 | 143220706672837 |
| 18 | 41293923006131 |
| 19 | 9928250098118791 |
| 20 | 10936700271572951 |
| 21 | 97615258031147892517 |
| 22 | 643700119549549507 |
| 23 | 62211198375587838727 |
[1,4,39,52,4069,8573,258017,46639,53371999, 113518551,768140741,1560819091,242830653007, 169134016817,38186305937387,408881289764107, 143220706672837,41293923006131,9928250098118791, 10936700271572951,97615258031147892517, 643700119549549507,62211198375587838727] |