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| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 5 |
| 3 | 13 |
| 4 | 85 |
| 5 | 157 |
| 6 | 12325 |
| 7 | 12461 |
| 8 | 106285 |
| 9 | 276341 |
| 10 | 339709 |
| 11 | 10363909 |
| 12 | 17238541 |
| 13 | 1936511509 |
| 14 | 51335823965 |
| 15 | 133473142309 |
| 16 | 872709007405 |
| 17 | 1574530008629 |
| 18 | 667511933218429 |
| 19 | 698925273030725 |
| 20 | 707670964169285 |
| 21 | 1839944506840141 |
[3,5,13,85,157,12325,12461,106285,276341,339709, 10363909,17238541,1936511509,51335823965, 133473142309,872709007405,1574530008629, 667511933218429,698925273030725,707670964169285, 1839944506840141] |