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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 5 |
| 4 | 9 |
| 5 | 13 |
| 6 | 33 |
| 7 | 73 |
| 8 | 145 |
| 9 | 313 |
| 10 | 657 |
| 11 | 1693 |
| 12 | 3705 |
| 13 | 8101 |
| 14 | 18753 |
| 15 | 45777 |
| 16 | 105857 |
| 17 | 238481 |
| 18 | 556257 |
| 19 | 1358901 |
| 20 | 3192585 |
| 21 | 7386269 |
| 22 | 17475041 |
| 23 | 42632153 |
| 24 | 101388497 |
| 25 | 238670857 |
| 26 | 566984561 |
| 27 | 1396385741 |
| 28 | 3345556153 |
| 29 | 7948311797 |
| 30 | 19091588993 |
| 31 | 46987486625 |
[1,1,5,9,13,33,73,145,313,657,1693,3705,8101, 18753,45777,105857,238481,556257,1358901,3192585, 7386269,17475041,42632153,101388497,238670857, 566984561,1396385741,3345556153,7948311797, 19091588993,46987486625] |