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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 3 |
| 3 | 5 |
| 4 | 11 |
| 5 | 31 |
| 6 | 127 |
| 7 | 709 |
| 8 | 5381 |
| 9 | 52711 |
| 10 | 648391 |
| 11 | 9737333 |
| 12 | 174440041 |
| 13 | 3657500101 |
| 14 | 88362852307 |
| 15 | 2428095424619 |
| 16 | 75063692618249 |
| 17 | 2586559730396077 |
| 18 | 98552043847093519 |
| 19 | 4123221751654370051 |
| 20 | 188272405179937051081 |
| 21 | 9332039515881088707361 |
| 22 | 499720579610303128776791 |
| 23 | 28785866289100396890228041 |
[1,2,3,5,11,31,127,709,5381,52711,648391,9737333, 174440041,3657500101,88362852307,2428095424619, 75063692618249,2586559730396077,98552043847093519, 4123221751654370051,188272405179937051081, 9332039515881088707361,499720579610303128776791, 28785866289100396890228041] |