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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 89 |
| 3 | 199 |
| 4 | 4679 |
| 5 | 1499 |
| 6 | 24593 |
| 7 | 118801 |
| 8 | 318569 |
| 9 | 1055741 |
| 10 | 2253311 |
| 11 | 3695513 |
| 12 | 4559983 |
| 13 | 22790969 |
| 14 | 29625383 |
| 15 | 85780433 |
| 16 | 108547289 |
| 17 | 1092631789 |
| 18 | 520956851 |
| 19 | 23522240041 |
| 20 | 11229387053 |
| 21 | 50466176303 |
| 22 | 325923513479 |
| 23 | 57958489439 |
| 24 | 537724352057 |
| 25 | 932937059897 |
| 26 | 1970378236613 |
| 27 | 12522644028841 |
[2,89,199,4679,1499,24593,118801,318569,1055741, 2253311,3695513,4559983,22790969,29625383, 85780433,108547289,1092631789,520956851, 23522240041,11229387053,50466176303,325923513479, 57958489439,537724352057,932937059897, 1970378236613,12522644028841] |