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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 7 |
| 3 | 17 |
| 4 | 143 |
| 5 | 1297 |
| 6 | 10943 |
| 7 | 119041 |
| 8 | 1352319 |
| 9 | 16521601 |
| 10 | 217712895 |
| 11 | 3035672577 |
| 12 | 44699885311 |
| 13 | 692651630593 |
| 14 | 11245459802111 |
| 15 | 190749994213377 |
| 16 | 3372199652642815 |
| 17 | 61989222776496129 |
| 18 | 1182514506870886399 |
| 19 | 23367685697859391489 |
| 20 | 477573301465741901823 |
| 21 | 10079510247865215746049 |
| 22 | 219396394337370417070079 |
| 23 | 4918940850123829203173377 |
| 24 | 113466581251217062104399871 |
| 25 | 2690031991636202195545948161 |
[1,7,17,143,1297,10943,119041,1352319,16521601, 217712895,3035672577,44699885311,692651630593, 11245459802111,190749994213377,3372199652642815, 61989222776496129,1182514506870886399, 23367685697859391489,477573301465741901823, 10079510247865215746049,219396394337370417070079, 4918940850123829203173377, 113466581251217062104399871, 2690031991636202195545948161] |