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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 9 |
| 3 | 19 |
| 4 | 65 |
| 5 | 75 |
| 6 | 385 |
| 7 | 531 |
| 8 | 1545 |
| 9 | 2115 |
| 10 | 10241 |
| 11 | 8283 |
| 12 | 49153 |
| 13 | 49539 |
| 14 | 131145 |
| 15 | 262675 |
| 16 | 1048577 |
| 17 | 788043 |
| 18 | 4718593 |
| 19 | 4196435 |
| 20 | 12583305 |
| 21 | 20981763 |
| 22 | 92274689 |
| 23 | 67117659 |
| 24 | 335544385 |
| 25 | 402702339 |
| 26 | 1207961097 |
| 27 | 1610662291 |
| 28 | 7516192769 |
| 29 | 4295100555 |
[1,3,9,19,65,75,385,531,1545,2115,10241,8283, 49153,49539,131145,262675,1048577,788043,4718593, 4196435,12583305,20981763,92274689,67117659, 335544385,402702339,1207961097,1610662291, 7516192769,4295100555] |