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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 5 |
| 3 | 17 |
| 4 | 33 |
| 5 | 65 |
| 6 | 193 |
| 7 | 529 |
| 8 | 1185 |
| 9 | 2737 |
| 10 | 7169 |
| 11 | 18257 |
| 12 | 43425 |
| 13 | 104945 |
| 14 | 264001 |
| 15 | 656785 |
| 16 | 1597665 |
| 17 | 3913009 |
| 18 | 9708161 |
| 19 | 23980241 |
| 20 | 58804257 |
| 21 | 144593009 |
| 22 | 357011905 |
| 23 | 879991825 |
| 24 | 2164014945 |
| 25 | 5327178673 |
| 26 | 13131288833 |
| 27 | 32347250513 |
| 28 | 79624144545 |
| 29 | 196075443953 |
[1,5,17,33,65,193,529,1185,2737,7169,18257,43425, 104945,264001,656785,1597665,3913009,9708161, 23980241,58804257,144593009,357011905,879991825, 2164014945,5327178673,13131288833,32347250513, 79624144545,196075443953] |