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| n | a(n) |
|---|---|
| 1 | 23 |
| 2 | 71 |
| 3 | 167 |
| 4 | 359 |
| 5 | 743 |
| 6 | 1511 |
| 7 | 12263 |
| 8 | 24551 |
| 9 | 196583 |
| 10 | 393191 |
| 11 | 786407 |
| 12 | 6291431 |
| 13 | 25165799 |
| 14 | 1610612711 |
| 15 | 6442450919 |
| 16 | 25769803751 |
| 17 | 103079215079 |
| 18 | 206158430183 |
| 19 | 6597069766631 |
| 20 | 864691128455135207 |
| 21 | 27670116110564327399 |
| 22 | 221360928884514619367 |
| 23 | 1770887431076116955111 |
[23,71,167,359,743,1511,12263,24551,196583,393191, 786407,6291431,25165799,1610612711,6442450919, 25769803751,103079215079,206158430183, 6597069766631,864691128455135207, 27670116110564327399,221360928884514619367, 1770887431076116955111] |